158798785231 has 4 divisors (see below), whose sum is σ = 158833930000. Its totient is φ = 158763640464.

The previous prime is 158798785213. The next prime is 158798785247. The reversal of 158798785231 is 132587897851.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 158798785231 - 2³⁵ = 124439046863 is a prime.

It is a super-2 number, since 2×158798785231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158798785631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17565606 + ... + 17574643.

It is an arithmetic number, because the mean of its divisors is an integer number (39708482500).

Almost surely, 2^158798785231 is an apocalyptic number.

158798785231 is a deficient number, since it is larger than the sum of its proper divisors (35144769).

158798785231 is an equidigital number, since it uses as much as digits as its factorization.

158798785231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35144768.

The product of its digits is 33868800, while the sum is 64.

It can be divided in two parts, 15879 and 8785231, that added together give a triangular number (8801110 = T₄₁₉₅).

The spelling of 158798785231 in words is "one hundred fifty-eight billion, seven hundred ninety-eight million, seven hundred eighty-five thousand, two hundred thirty-one".