157859727121 has 2 divisors, whose sum is σ = 157859727122. Its totient is φ = 157859727120.

The previous prime is 157859727089. The next prime is 157859727173. The reversal of 157859727121 is 121727958751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127952867025 + 29906860096 = 357705^2 + 172936^2 .

It is a cyclic number.

It is not a de Polignac number, because 157859727121 - 2⁵ = 157859727089 is a prime.

It is not a weakly prime, because it can be changed into another prime (157859727191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78929863560 + 78929863561.

It is an arithmetic number, because the mean of its divisors is an integer number (78929863561).

Almost surely, 2^157859727121 is an apocalyptic number.

It is an amenable number.

157859727121 is a deficient number, since it is larger than the sum of its proper divisors (1).

157859727121 is an equidigital number, since it uses as much as digits as its factorization.

157859727121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2469600, while the sum is 55.

The spelling of 157859727121 in words is "one hundred fifty-seven billion, eight hundred fifty-nine million, seven hundred twenty-seven thousand, one hundred twenty-one".