12626433640 has 32 divisors (see below), whose sum is σ = 28415266560. Its totient is φ = 5049544000.

The previous prime is 12626433637. The next prime is 12626433653. The reversal of 12626433640 is 4633462621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12626433640.

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, 184545 + ... + 243535.

It is an arithmetic number, because the mean of its divisors is an integer number (887977080).

Almost surely, 2^12626433640 is an apocalyptic number.

12626433640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12626433640 is an abundant number, since it is smaller than the sum of its proper divisors (15788832920).

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

12626433640 is a wasteful number, since it uses less digits than its factorization.

12626433640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64353 (or 64349 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 37.

The spelling of 12626433640 in words is "twelve billion, six hundred twenty-six million, four hundred thirty-three thousand, six hundred forty".