12636122644 has 24 divisors (see below), whose sum is σ = 23461740288. Its totient is φ = 5934284160.

The previous prime is 12636122617. The next prime is 12636122657. The reversal of 12636122644 is 44622163621.

It is a congruent number.

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, 155844 + ... + 222619.

It is an arithmetic number, because the mean of its divisors is an integer number (977572512).

Almost surely, 2^12636122644 is an apocalyptic number.

It is an amenable number.

12636122644 is a deficient number, since it is larger than the sum of its proper divisors (10825617644).

12636122644 is a wasteful number, since it uses less digits than its factorization.

12636122644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378975 (or 378973 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The spelling of 12636122644 in words is "twelve billion, six hundred thirty-six million, one hundred twenty-two thousand, six hundred forty-four".