12506645700 has 72 divisors (see below), whose sum is σ = 40206558560. Its totient is φ = 3335104800.

The previous prime is 12506645693. The next prime is 12506645729. The reversal of 12506645700 is 754660521.

It is a happy number.

12506645700 is a `hidden beast` number, since 1 + 2 + 5 + 0 + 6 + 645 + 7 + 0 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2313346 + ... + 2318745.

Almost surely, 2^12506645700 is an apocalyptic number.

12506645700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12506645700 is an abundant number, since it is smaller than the sum of its proper divisors (27699912860).

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

12506645700 is a wasteful number, since it uses less digits than its factorization.

12506645700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4632114 (or 4632101 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 12506645700 in words is "twelve billion, five hundred six million, six hundred forty-five thousand, seven hundred".