158712521172 has 48 divisors (see below), whose sum is σ = 392665707840. Its totient is φ = 49753896192.

The previous prime is 158712521167. The next prime is 158712521173. The reversal of 158712521172 is 271125217851.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158712521173) 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, 2509303 + ... + 2571774.

It is an arithmetic number, because the mean of its divisors is an integer number (8180535580).

Almost surely, 2^158712521172 is an apocalyptic number.

158712521172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

158712521172 is an abundant number, since it is smaller than the sum of its proper divisors (233953186668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158712521172 is a wasteful number, since it uses less digits than its factorization.

158712521172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5081240 (or 5081238 counting only the distinct ones).

The product of its digits is 78400, while the sum is 42.

The spelling of 158712521172 in words is "one hundred fifty-eight billion, seven hundred twelve million, five hundred twenty-one thousand, one hundred seventy-two".