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12870261500 = 2253211121993
BaseRepresentation
bin10111111110010000…
…01001101011111100
31020012221200000200212
423333020021223330
5202324241332000
65525034211552
7633636263165
oct137710115374
936187600625
1012870261500
115504a21a58
1225b2283bb8
1312a1548265
148a143676c
15504d75c35
hex2ff209afc

12870261500 has 48 divisors (see below), whose sum is σ = 28242098976. Its totient is φ = 5123664000.

The previous prime is 12870261499. The next prime is 12870261517. The reversal of 12870261500 is 516207821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44504 + ... + 166496.

It is an arithmetic number, because the mean of its divisors is an integer number (588377062).

Almost surely, 212870261500 is an apocalyptic number.

12870261500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12870261500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14121049488).

12870261500 is an abundant number, since it is smaller than the sum of its proper divisors (15371837476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12870261500 is a wasteful number, since it uses less digits than its factorization.

12870261500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122223 (or 122211 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 32.

The spelling of 12870261500 in words is "twelve billion, eight hundred seventy million, two hundred sixty-one thousand, five hundred".

Divisors: 1 2 4 5 10 20 25 50 100 125 211 250 422 500 844 1055 2110 4220 5275 10550 21100 26375 52750 105500 121993 243986 487972 609965 1219930 2439860 3049825 6099650 12199300 15249125 25740523 30498250 51481046 60996500 102962092 128702615 257405230 514810460 643513075 1287026150 2574052300 3217565375 6435130750 12870261500