111580215945 has 48 divisors (see below), whose sum is σ = 196285783680. Its totient is φ = 54085123840.

The previous prime is 111580215941. The next prime is 111580215979. The reversal of 111580215945 is 549512085111.

It is not a de Polignac number, because 111580215945 - 2² = 111580215941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111580215897 and 111580215906.

It is not an unprimeable number, because it can be changed into a prime (111580215941) 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, 10665157 + ... + 10675613.

It is an arithmetic number, because the mean of its divisors is an integer number (4089287160).

Almost surely, 2^111580215945 is an apocalyptic number.

111580215945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111580215945 is a deficient number, since it is larger than the sum of its proper divisors (84705567735).

111580215945 is a wasteful number, since it uses less digits than its factorization.

111580215945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16366 (or 16355 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 42.

The spelling of 111580215945 in words is "one hundred eleven billion, five hundred eighty million, two hundred fifteen thousand, nine hundred forty-five".