12578388032 has 56 divisors (see below), whose sum is σ = 29221785600. Its totient is φ = 5259248640.

The previous prime is 12578388023. The next prime is 12578388047. The reversal of 12578388032 is 23088387521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

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, 324032 + ... + 360767.

It is an arithmetic number, because the mean of its divisors is an integer number (521817600).

Almost surely, 2^12578388032 is an apocalyptic number.

It is an amenable number.

12578388032 is an abundant number, since it is smaller than the sum of its proper divisors (16643397568).

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

12578388032 is an equidigital number, since it uses as much as digits as its factorization.

12578388032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684859 (or 684849 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 12578388032 in words is "twelve billion, five hundred seventy-eight million, three hundred eighty-eight thousand, thirty-two".