117761921128 has 32 divisors (see below), whose sum is σ = 223712402760. Its totient is φ = 58108723200.

The previous prime is 117761921111. The next prime is 117761921149. The reversal of 117761921128 is 821129167711.

It can be written as a sum of positive squares in 4 ways, for example, as 101992087044 + 15769834084 = 319362^2 + 125578^2 .

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, 58978 + ... + 488878.

Almost surely, 2^117761921128 is an apocalyptic number.

It is an amenable number.

117761921128 is a deficient number, since it is larger than the sum of its proper divisors (105950481632).

117761921128 is a wasteful number, since it uses less digits than its factorization.

117761921128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430357 (or 430353 counting only the distinct ones).

The product of its digits is 84672, while the sum is 46.

The spelling of 117761921128 in words is "one hundred seventeen billion, seven hundred sixty-one million, nine hundred twenty-one thousand, one hundred twenty-eight".