158891579775828 has 144 divisors (see below), whose sum is σ = 413547686383104. Its totient is φ = 51413776888320.

The previous prime is 158891579775811. The next prime is 158891579775847. The reversal of 158891579775828 is 828577975198851.

158891579775828 is a `hidden beast` number, since 1 + 5 + 8 + 8 + 9 + 1 + 579 + 7 + 7 + 5 + 8 + 28 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 128516518 + ... + 129746978.

It is an arithmetic number, because the mean of its divisors is an integer number (2871858933216).

Almost surely, 2^{158891579775828} is an apocalyptic number.

158891579775828 is a gapful number since it is divisible by the number (18) 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 158891579775828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206773843191552).

158891579775828 is an abundant number, since it is smaller than the sum of its proper divisors (254656106607276).

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

158891579775828 is a wasteful number, since it uses less digits than its factorization.

158891579775828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231142 (or 1231137 counting only the distinct ones).

The product of its digits is 28449792000, while the sum is 90.

The spelling of 158891579775828 in words is "one hundred fifty-eight trillion, eight hundred ninety-one billion, five hundred seventy-nine million, seven hundred seventy-five thousand, eight hundred twenty-eight".