111939271945 has 16 divisors (see below), whose sum is σ = 138151681920. Its totient is φ = 87019120000.

The previous prime is 111939271937. The next prime is 111939271949. The reversal of 111939271945 is 549172939111.

It is not a de Polignac number, because 111939271945 - 2³ = 111939271937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111939271892 and 111939271901.

It is not an unprimeable number, because it can be changed into a prime (111939271949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1036285 + ... + 1139194.

It is an arithmetic number, because the mean of its divisors is an integer number (8634480120).

Almost surely, 2^111939271945 is an apocalyptic number.

It is an amenable number.

111939271945 is a deficient number, since it is larger than the sum of its proper divisors (26212409975).

111939271945 is a wasteful number, since it uses less digits than its factorization.

111939271945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175776.

The product of its digits is 612360, while the sum is 52.

The spelling of 111939271945 in words is "one hundred eleven billion, nine hundred thirty-nine million, two hundred seventy-one thousand, nine hundred forty-five".