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13087075680 = 25325712710223
BaseRepresentation
bin11000011000000110…
…01110110101100000
31020210001122022211200
430030003032311200
5203300242410210
610002341241200
7642211210410
oct141403166540
936701568750
1013087075680
115606349728
122652a03200
13130743b883
148c2154640
15518e020c0
hex30c0ced60

13087075680 has 288 divisors, whose sum is σ = 51446513664. Its totient is φ = 2967487488.

The previous prime is 13087075679. The next prime is 13087075747. The reversal of 13087075680 is 8657078031.

13087075680 is a `hidden beast` number, since 1 + 3 + 0 + 87 + 0 + 7 + 568 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1275049 + ... + 1285271.

It is an arithmetic number, because the mean of its divisors is an integer number (178633728).

Almost surely, 213087075680 is an apocalyptic number.

13087075680 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 13087075680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25723256832).

13087075680 is an abundant number, since it is smaller than the sum of its proper divisors (38359437984).

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

13087075680 is a wasteful number, since it uses less digits than its factorization.

13087075680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10378 (or 10367 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 13087075680 in words is "thirteen billion, eighty-seven million, seventy-five thousand, six hundred eighty".