2157949116 has 36 divisors (see below), whose sum is σ = 5456788792. Its totient is φ = 719056224.

The previous prime is 2157949097. The next prime is 2157949141. The reversal of 2157949116 is 6119497512.

2157949116 is a `hidden beast` number, since 2 + 157 + 9 + 491 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107895 + ... + 126321.

Almost surely, 2^2157949116 is an apocalyptic number.

It is an amenable number.

2157949116 is an abundant number, since it is smaller than the sum of its proper divisors (3298839676).

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

2157949116 is a wasteful number, since it uses less digits than its factorization.

2157949116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21690 (or 21685 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 2157949116 is about 46453.7309158263. The cubic root of 2157949116 is about 1292.2515645004.

The spelling of 2157949116 in words is "two billion, one hundred fifty-seven million, nine hundred forty-nine thousand, one hundred sixteen".