111620181608 has 16 divisors (see below), whose sum is σ = 225386905380. Its totient is φ = 51517006848.

The previous prime is 111620181593. The next prime is 111620181637. The reversal of 111620181608 is 806181026111.

It can be written as a sum of positive squares in 2 ways, for example, as 111568024324 + 52157284 = 334018^2 + 7222^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536635385 + ... + 536635592.

Almost surely, 2^111620181608 is an apocalyptic number.

It is an amenable number.

111620181608 is an abundant number, since it is smaller than the sum of its proper divisors (113766723772).

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

111620181608 is a wasteful number, since it uses less digits than its factorization.

111620181608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073270996 (or 1073270992 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 35.

The spelling of 111620181608 in words is "one hundred eleven billion, six hundred twenty million, one hundred eighty-one thousand, six hundred eight".