2154639756 has 24 divisors (see below), whose sum is σ = 5037384240. Its totient is φ = 716800192.

The previous prime is 2154639737. The next prime is 2154639761. The reversal of 2154639756 is 6579364512.

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 7 ways as a sum of consecutive naturals, for example, 170271 + ... + 182486.

It is an arithmetic number, because the mean of its divisors is an integer number (209891010).

Almost surely, 2^2154639756 is an apocalyptic number.

It is an amenable number.

2154639756 is an abundant number, since it is smaller than the sum of its proper divisors (2882744484).

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

2154639756 is a wasteful number, since it uses less digits than its factorization.

2154639756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353273 (or 353271 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 48.

The square root of 2154639756 is about 46418.0972897425. The cubic root of 2154639756 is about 1291.5906416542.

The spelling of 2154639756 in words is "two billion, one hundred fifty-four million, six hundred thirty-nine thousand, seven hundred fifty-six".