157239392861 has 4 divisors (see below), whose sum is σ = 165515150400. Its totient is φ = 148963635324.

The previous prime is 157239392851. The next prime is 157239392887. The reversal of 157239392861 is 168293932751.

157239392861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157239392861 - 2²⁶ = 157172283997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157239392797 and 157239392806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157239392801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4137878741 + ... + 4137878778.

It is an arithmetic number, because the mean of its divisors is an integer number (41378787600).

Almost surely, 2^157239392861 is an apocalyptic number.

It is an amenable number.

157239392861 is a deficient number, since it is larger than the sum of its proper divisors (8275757539).

157239392861 is an equidigital number, since it uses as much as digits as its factorization.

157239392861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8275757538.

The product of its digits is 4898880, while the sum is 56.

The spelling of 157239392861 in words is "one hundred fifty-seven billion, two hundred thirty-nine million, three hundred ninety-two thousand, eight hundred sixty-one".