12640264624 has 40 divisors (see below), whose sum is σ = 26437526640. Its totient is φ = 5820004608.

The previous prime is 12640264573. The next prime is 12640264631. The reversal of 12640264624 is 42646204621.

It is a super-2 number, since 2×12640264624² (a number of 21 digits) contains 22 as substring.

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, 14634 + ... + 159670.

It is an arithmetic number, because the mean of its divisors is an integer number (660938166).

Almost surely, 2^12640264624 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 12640264624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13218763320).

12640264624 is an abundant number, since it is smaller than the sum of its proper divisors (13797262016).

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

12640264624 is a wasteful number, since it uses less digits than its factorization.

12640264624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145477 (or 145471 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 12640264624 in words is "twelve billion, six hundred forty million, two hundred sixty-four thousand, six hundred twenty-four".