111472918639 has 4 divisors (see below), whose sum is σ = 111496625856. Its totient is φ = 111449211424.

The previous prime is 111472918633. The next prime is 111472918673. The reversal of 111472918639 is 936819274111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111472918639 - 2¹⁹ = 111472394351 is a prime.

It is a super-2 number, since 2×111472918639² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111472918633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11846554 + ... + 11855959.

It is an arithmetic number, because the mean of its divisors is an integer number (27874156464).

Almost surely, 2^111472918639 is an apocalyptic number.

111472918639 is a deficient number, since it is larger than the sum of its proper divisors (23707217).

111472918639 is an equidigital number, since it uses as much as digits as its factorization.

111472918639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23707216.

The product of its digits is 653184, while the sum is 52.

The spelling of 111472918639 in words is "one hundred eleven billion, four hundred seventy-two million, nine hundred eighteen thousand, six hundred thirty-nine".