158399059731 has 16 divisors (see below), whose sum is σ = 233315074560. Its totient is φ = 94784245920.

The previous prime is 158399059727. The next prime is 158399059739. The reversal of 158399059731 is 137950993851.

It is not a de Polignac number, because 158399059731 - 2² = 158399059727 is a prime.

It is a super-2 number, since 2×158399059731² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (158399059739) 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, 30376960 + ... + 30382173.

It is an arithmetic number, because the mean of its divisors is an integer number (14582192160).

Almost surely, 2^158399059731 is an apocalyptic number.

158399059731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

158399059731 is a deficient number, since it is larger than the sum of its proper divisors (74916014829).

158399059731 is a wasteful number, since it uses less digits than its factorization.

158399059731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60759226.

The product of its (nonzero) digits is 9185400, while the sum is 60.

The spelling of 158399059731 in words is "one hundred fifty-eight billion, three hundred ninety-nine million, fifty-nine thousand, seven hundred thirty-one".