12707897520 has 80 divisors (see below), whose sum is σ = 40355354592. Its totient is φ = 3306117120.

The previous prime is 12707897519. The next prime is 12707897537. The reversal of 12707897520 is 2579870721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×12707897520² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 12707897520.

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, 635887 + ... + 655566.

Almost surely, 2^12707897520 is an apocalyptic number.

12707897520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12707897520 is an abundant number, since it is smaller than the sum of its proper divisors (27647457072).

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

12707897520 is a wasteful number, since it uses less digits than its factorization.

12707897520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291510 (or 1291504 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 48.

The spelling of 12707897520 in words is "twelve billion, seven hundred seven million, eight hundred ninety-seven thousand, five hundred twenty".