12717621252 has 36 divisors (see below), whose sum is σ = 36739795456. Its totient is φ = 3633606000.

The previous prime is 12717621251. The next prime is 12717621263. The reversal of 12717621252 is 25212671721.

12717621252 is a `hidden beast` number, since 1 + 2 + 7 + 1 + 7 + 621 + 25 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (12717621251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25233124 + ... + 25233627.

Almost surely, 2^12717621252 is an apocalyptic number.

12717621252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12717621252 is an abundant number, since it is smaller than the sum of its proper divisors (24022174204).

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

12717621252 is a wasteful number, since it uses less digits than its factorization.

12717621252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50466768 (or 50466763 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The spelling of 12717621252 in words is "twelve billion, seven hundred seventeen million, six hundred twenty-one thousand, two hundred fifty-two".