2137556808 has 24 divisors (see below), whose sum is σ = 5789216550. Its totient is φ = 712518912.

The previous prime is 2137556779. The next prime is 2137556821. The reversal of 2137556808 is 8086557312.

2137556808 is a `hidden beast` number, since 2 + 13 + 7 + 556 + 80 + 8 = 666.

2137556808 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1432016964 + 705539844 = 37842^2 + 26562^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14844073 + ... + 14844216.

Almost surely, 2^2137556808 is an apocalyptic number.

It is an amenable number.

2137556808 is an abundant number, since it is smaller than the sum of its proper divisors (3651659742).

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

2137556808 is a wasteful number, since it uses less digits than its factorization.

2137556808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29688301 (or 29688294 counting only the distinct ones).

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

The square root of 2137556808 is about 46233.7193831515. The cubic root of 2137556808 is about 1288.1681444642.

The spelling of 2137556808 in words is "two billion, one hundred thirty-seven million, five hundred fifty-six thousand, eight hundred eight".