2156618754 has 24 divisors (see below), whose sum is σ = 4676310912. Its totient is φ = 718313400.

The previous prime is 2156618753. The next prime is 2156618767. The reversal of 2156618754 is 4578166512.

2156618754 is a `hidden beast` number, since 2 + 1 + 566 + 1 + 87 + 5 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (2156618753) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22522 + ... + 69429.

It is an arithmetic number, because the mean of its divisors is an integer number (194846288).

Almost surely, 2^2156618754 is an apocalyptic number.

2156618754 is an abundant number, since it is smaller than the sum of its proper divisors (2519692158).

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

2156618754 is a wasteful number, since it uses less digits than its factorization.

2156618754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93262 (or 93259 counting only the distinct ones).

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

The square root of 2156618754 is about 46439.4094923697. The cubic root of 2156618754 is about 1291.9859549349.

The spelling of 2156618754 in words is "two billion, one hundred fifty-six million, six hundred eighteen thousand, seven hundred fifty-four".