2138087556 has 96 divisors (see below), whose sum is σ = 6365452800. Its totient is φ = 613798560.

The previous prime is 2138087551. The next prime is 2138087573. The reversal of 2138087556 is 6557808312.

2138087556 is a `hidden beast` number, since 2 + 13 + 8 + 0 + 87 + 556 = 666.

It is not an unprimeable number, because it can be changed into a prime (2138087551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24790 + ... + 69933.

It is an arithmetic number, because the mean of its divisors is an integer number (66306800).

Almost surely, 2^2138087556 is an apocalyptic number.

It is an amenable number.

2138087556 is an abundant number, since it is smaller than the sum of its proper divisors (4227365244).

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

2138087556 is a wasteful number, since it uses less digits than its factorization.

2138087556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94766 (or 94758 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 2138087556 is about 46239.4588636156. The cubic root of 2138087556 is about 1288.2747515472.

The spelling of 2138087556 in words is "two billion, one hundred thirty-eight million, eighty-seven thousand, five hundred fifty-six".