12500535400 has 24 divisors (see below), whose sum is σ = 29063745270. Its totient is φ = 5000214080.

The previous prime is 12500535367. The next prime is 12500535407. The reversal of 12500535400 is 453500521.

It can be written as a sum of positive squares in 3 ways, for example, as 7634914884 + 4865620516 = 87378^2 + 69754^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (12500535407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31251139 + ... + 31251538.

Almost surely, 2^12500535400 is an apocalyptic number.

12500535400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12500535400 is an abundant number, since it is smaller than the sum of its proper divisors (16563209870).

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

12500535400 is a wasteful number, since it uses less digits than its factorization.

12500535400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62502693 (or 62502684 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The spelling of 12500535400 in words is "twelve billion, five hundred million, five hundred thirty-five thousand, four hundred".