158521023072 has 144 divisors (see below), whose sum is σ = 458133360048. Its totient is φ = 51983769600.

The previous prime is 158521023053. The next prime is 158521023083. The reversal of 158521023072 is 270320125851.

158521023072 is a `hidden beast` number, since 1 + 585 + 2 + 1 + 0 + 2 + 3 + 0 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8421223 + ... + 8440025.

It is an arithmetic number, because the mean of its divisors is an integer number (3181481667).

Almost surely, 2^158521023072 is an apocalyptic number.

158521023072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158521023072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229066680024).

158521023072 is an abundant number, since it is smaller than the sum of its proper divisors (299612336976).

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

158521023072 is a wasteful number, since it uses less digits than its factorization.

158521023072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19293 (or 19282 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 158521023072 in words is "one hundred fifty-eight billion, five hundred twenty-one million, twenty-three thousand, seventy-two".