12500024400 has 90 divisors (see below), whose sum is σ = 43378569390. Its totient is φ = 3333338880.

The previous prime is 12500024371. The next prime is 12500024417. The reversal of 12500024400 is 442000521.

It can be written as a sum of positive squares in 3 ways, for example, as 3124362816 + 9375661584 = 55896^2 + 96828^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is a super-2 number, since 2×12500024400² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1732515 + ... + 1739714.

Almost surely, 2^12500024400 is an apocalyptic number.

12500024400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12500024400 is an abundant number, since it is smaller than the sum of its proper divisors (30878544990).

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

12500024400 is a wasteful number, since it uses less digits than its factorization.

12500024400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3472253 (or 3472239 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 12500024400 its reverse (442000521), we get a palindrome (12942024921).

The spelling of 12500024400 in words is "twelve billion, five hundred million, twenty-four thousand, four hundred".