157365865 has 4 divisors (see below), whose sum is σ = 188839044. Its totient is φ = 125892688.

The previous prime is 157365841. The next prime is 157365911. The reversal of 157365865 is 568563751.

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

It can be written as a sum of positive squares in 2 ways, for example, as 101848464 + 55517401 = 10092^2 + 7451^2 .

It is a cyclic number.

It is not a de Polignac number, because 157365865 - 2⁵ = 157365833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15736582 + ... + 15736591.

It is an arithmetic number, because the mean of its divisors is an integer number (47209761).

Almost surely, 2^157365865 is an apocalyptic number.

It is an amenable number.

157365865 is a deficient number, since it is larger than the sum of its proper divisors (31473179).

157365865 is an equidigital number, since it uses as much as digits as its factorization.

157365865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31473178.

The product of its digits is 756000, while the sum is 46.

The square root of 157365865 is about 12544.5551933897. Note that the first 3 decimals coincide. The cubic root of 157365865 is about 539.8877967608.

The spelling of 157365865 in words is "one hundred fifty-seven million, three hundred sixty-five thousand, eight hundred sixty-five".