2138644957296 has 40 divisors (see below), whose sum is σ = 5530897499904. Its totient is φ = 712099111360.

The previous prime is 2138644957261. The next prime is 2138644957301. The reversal of 2138644957296 is 6927594468312.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 24410226 + ... + 24497681.

Almost surely, 2^{2138644957296} is an apocalyptic number.

It is an amenable number.

2138644957296 is an abundant number, since it is smaller than the sum of its proper divisors (3392252542608).

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

2138644957296 is a wasteful number, since it uses less digits than its factorization.

2138644957296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48908829 (or 48908823 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 66.

The spelling of 2138644957296 in words is "two trillion, one hundred thirty-eight billion, six hundred forty-four million, nine hundred fifty-seven thousand, two hundred ninety-six".