2138575656 has 64 divisors (see below), whose sum is σ = 6469649280. Its totient is φ = 575078400.

The previous prime is 2138575643. The next prime is 2138575667. The reversal of 2138575656 is 6565758312.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371545 + ... + 377256.

It is an arithmetic number, because the mean of its divisors is an integer number (101088270).

Almost surely, 2^2138575656 is an apocalyptic number.

It is an amenable number.

2138575656 is an abundant number, since it is smaller than the sum of its proper divisors (4331073624).

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

2138575656 is a wasteful number, since it uses less digits than its factorization.

2138575656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748834 (or 748830 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 48.

The square root of 2138575656 is about 46244.7365221168. The cubic root of 2138575656 is about 1288.3727766976.

The spelling of 2138575656 in words is "two billion, one hundred thirty-eight million, five hundred seventy-five thousand, six hundred fifty-six".