12521717360 has 20 divisors (see below), whose sum is σ = 29112993048. Its totient is φ = 5008686912.

The previous prime is 12521717359. The next prime is 12521717363. The reversal of 12521717360 is 6371712521.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 12521717360.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12521717363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78260654 + ... + 78260813.

Almost surely, 2^12521717360 is an apocalyptic number.

12521717360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12521717360 is an abundant number, since it is smaller than the sum of its proper divisors (16591275688).

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

12521717360 is a wasteful number, since it uses less digits than its factorization.

12521717360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156521480 (or 156521474 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 12521717360 in words is "twelve billion, five hundred twenty-one million, seven hundred seventeen thousand, three hundred sixty".