158774868021 has 48 divisors (see below), whose sum is σ = 277914507840. Its totient is φ = 79636273920.

The previous prime is 158774868017. The next prime is 158774868041. The reversal of 158774868021 is 120868477851.

It is not a de Polignac number, because 158774868021 - 2² = 158774868017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158774868041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1646056 + ... + 1739841.

It is an arithmetic number, because the mean of its divisors is an integer number (5789885580).

Almost surely, 2^158774868021 is an apocalyptic number.

158774868021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

158774868021 is a deficient number, since it is larger than the sum of its proper divisors (119139639819).

158774868021 is a wasteful number, since it uses less digits than its factorization.

158774868021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385954 (or 3385947 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 57.

The spelling of 158774868021 in words is "one hundred fifty-eight billion, seven hundred seventy-four million, eight hundred sixty-eight thousand, twenty-one".