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12815013470 = 257317577513
BaseRepresentation
bin10111110111101010…
…11001011001011110
31020002002201010122112
423323311121121132
5202221120412340
65515342114022
7632365550210
oct137365313136
936062633575
1012815013470
115486817326
12259787b912
131292c7320c
14897d745b0
155000b1065
hex2fbd5965e

12815013470 has 32 divisors (see below), whose sum is σ = 26445521088. Its totient is φ = 4379851008.

The previous prime is 12815013469. The next prime is 12815013473. The reversal of 12815013470 is 7431051821.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12815013473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266567 + ... + 310946.

It is an arithmetic number, because the mean of its divisors is an integer number (826422534).

Almost surely, 212815013470 is an apocalyptic number.

12815013470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12815013470 is an abundant number, since it is smaller than the sum of its proper divisors (13630507618).

12815013470 is a wasteful number, since it uses less digits than its factorization.

12815013470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577844.

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

The spelling of 12815013470 in words is "twelve billion, eight hundred fifteen million, thirteen thousand, four hundred seventy".

Divisors: 1 2 5 7 10 14 35 70 317 634 1585 2219 3170 4438 11095 22190 577513 1155026 2887565 4042591 5775130 8085182 20212955 40425910 183071621 366143242 915358105 1281501347 1830716210 2563002694 6407506735 12815013470