158168315520 has 512 divisors, whose sum is σ = 604381824000. Its totient is φ = 38944309248.

The previous prime is 158168315497. The next prime is 158168315521. The reversal of 158168315520 is 25513861851.

158168315520 is a `hidden beast` number, since 1 + 5 + 8 + 1 + 68 + 31 + 552 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (158168315521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15564201 + ... + 15574359.

It is an arithmetic number, because the mean of its divisors is an integer number (1180433250).

Almost surely, 2^158168315520 is an apocalyptic number.

158168315520 is a gapful number since it is divisible by the number (10) 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 158168315520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302190912000).

158168315520 is an abundant number, since it is smaller than the sum of its proper divisors (446213508480).

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

158168315520 is a wasteful number, since it uses less digits than its factorization.

158168315520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10257 (or 10239 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 45.

The spelling of 158168315520 in words is "one hundred fifty-eight billion, one hundred sixty-eight million, three hundred fifteen thousand, five hundred twenty".