12901039657644 has 24 divisors (see below), whose sum is σ = 30595908260848. Its totient is φ = 4229849067840.

The previous prime is 12901039657621. The next prime is 12901039657697. The reversal of 12901039657644 is 44675693010921.

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, 8812184827 + ... + 8812186290.

Almost surely, 2^{12901039657644} is an apocalyptic number.

It is an amenable number.

12901039657644 is an abundant number, since it is smaller than the sum of its proper divisors (17694868603204).

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

12901039657644 is a wasteful number, since it uses less digits than its factorization.

12901039657644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17624371185 (or 17624371183 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 12901039657644 in words is "twelve trillion, nine hundred one billion, thirty-nine million, six hundred fifty-seven thousand, six hundred forty-four".