12500535424 has 64 divisors (see below), whose sum is σ = 26845985880. Its totient is φ = 5763686400.

The previous prime is 12500535407. The next prime is 12500535431. The reversal of 12500535424 is 42453500521.

It can be written as a sum of positive squares in 4 ways, for example, as 9896270400 + 2604265024 = 99480^2 + 51032^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1962004 + ... + 1968364.

Almost surely, 2^12500535424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12500535424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13422992940).

12500535424 is an abundant number, since it is smaller than the sum of its proper divisors (14345450456).

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

12500535424 is a wasteful number, since it uses less digits than its factorization.

12500535424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7569 (or 7557 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 12500535424 in words is "twelve billion, five hundred million, five hundred thirty-five thousand, four hundred twenty-four".