2156761914 has 16 divisors (see below), whose sum is σ = 4339355328. Its totient is φ = 714615392.

The previous prime is 2156761903. The next prime is 2156761921. The reversal of 2156761914 is 4191676512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1075227 + ... + 1077230.

It is an arithmetic number, because the mean of its divisors is an integer number (271209708).

Almost surely, 2^2156761914 is an apocalyptic number.

2156761914 is an abundant number, since it is smaller than the sum of its proper divisors (2182593414).

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

2156761914 is a wasteful number, since it uses less digits than its factorization.

2156761914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152629.

The product of its digits is 90720, while the sum is 42.

The square root of 2156761914 is about 46440.9508300595. The cubic root of 2156761914 is about 1292.0145423732.

The spelling of 2156761914 in words is "two billion, one hundred fifty-six million, seven hundred sixty-one thousand, nine hundred fourteen".