12636012440 has 16 divisors (see below), whose sum is σ = 28431028080. Its totient is φ = 5054404960.

The previous prime is 12636012439. The next prime is 12636012469. The reversal of 12636012440 is 4421063621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157950116 + ... + 157950195.

It is an arithmetic number, because the mean of its divisors is an integer number (1776939255).

Almost surely, 2^12636012440 is an apocalyptic number.

12636012440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12636012440 is an abundant number, since it is smaller than the sum of its proper divisors (15795015640).

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

12636012440 is a wasteful number, since it uses less digits than its factorization.

12636012440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315900322 (or 315900318 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 12636012440 in words is "twelve billion, six hundred thirty-six million, twelve thousand, four hundred forty".