111520575987 has 16 divisors (see below), whose sum is σ = 154511293440. Its totient is φ = 71461448352.

The previous prime is 111520575973. The next prime is 111520575989. The reversal of 111520575987 is 789575025111.

It is not a de Polignac number, because 111520575987 - 2¹⁸ = 111520313843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111520575989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2854693 + ... + 2893494.

It is an arithmetic number, because the mean of its divisors is an integer number (9656955840).

Almost surely, 2^111520575987 is an apocalyptic number.

111520575987 is a deficient number, since it is larger than the sum of its proper divisors (42990717453).

111520575987 is a wasteful number, since it uses less digits than its factorization.

111520575987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5748442.

The product of its (nonzero) digits is 882000, while the sum is 51.

The spelling of 111520575987 in words is "one hundred eleven billion, five hundred twenty million, five hundred seventy-five thousand, nine hundred eighty-seven".