12526669644 has 24 divisors (see below), whose sum is σ = 29251295808. Its totient is φ = 4172356560.

The previous prime is 12526669637. The next prime is 12526669663. The reversal of 12526669644 is 44696662521.

It is a happy number.

It is a super-2 number, since 2×12526669644² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383662 + ... + 415029.

It is an arithmetic number, because the mean of its divisors is an integer number (1218803992).

Almost surely, 2^12526669644 is an apocalyptic number.

It is an amenable number.

12526669644 is an abundant number, since it is smaller than the sum of its proper divisors (16724626164).

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

12526669644 is a wasteful number, since it uses less digits than its factorization.

12526669644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800005 (or 800003 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The spelling of 12526669644 in words is "twelve billion, five hundred twenty-six million, six hundred sixty-nine thousand, six hundred forty-four".