2156118031773 has 48 divisors (see below), whose sum is σ = 3371201433600. Its totient is φ = 1374492653424.

The previous prime is 2156118031759. The next prime is 2156118031783. The reversal of 2156118031773 is 3771308116512.

2156118031773 is a `hidden beast` number, since 2 + 1 + 561 + 1 + 8 + 0 + 3 + 17 + 73 = 666.

It is not a de Polignac number, because 2156118031773 - 2⁸ = 2156118031517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156118031703) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18626328 + ... + 18741726.

It is an arithmetic number, because the mean of its divisors is an integer number (70233363200).

Almost surely, 2^{2156118031773} is an apocalyptic number.

2156118031773 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2156118031773 is a deficient number, since it is larger than the sum of its proper divisors (1215083401827).

2156118031773 is a wasteful number, since it uses less digits than its factorization.

2156118031773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118780 (or 118768 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 2156118031773 in words is "two trillion, one hundred fifty-six billion, one hundred eighteen million, thirty-one thousand, seven hundred seventy-three".