158638630931 has 4 divisors (see below), whose sum is σ = 173060324664. Its totient is φ = 144216937200.

The previous prime is 158638630919. The next prime is 158638630937. The reversal of 158638630931 is 139036836851.

158638630931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 158638630931 - 2³⁴ = 141458761747 is a prime.

It is a super-2 number, since 2×158638630931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158638630937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7210846850 + ... + 7210846871.

It is an arithmetic number, because the mean of its divisors is an integer number (43265081166).

Almost surely, 2^158638630931 is an apocalyptic number.

158638630931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

158638630931 is a deficient number, since it is larger than the sum of its proper divisors (14421693733).

158638630931 is a wasteful number, since it uses less digits than its factorization.

158638630931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14421693732.

The product of its (nonzero) digits is 2799360, while the sum is 53.

The spelling of 158638630931 in words is "one hundred fifty-eight billion, six hundred thirty-eight million, six hundred thirty thousand, nine hundred thirty-one".