157865565 has 32 divisors (see below), whose sum is σ = 296747136. Its totient is φ = 70652160.

The previous prime is 157865507. The next prime is 157865567. The reversal of 157865565 is 565568751.

It is not a de Polignac number, because 157865565 - 2⁷ = 157865437 is a prime.

It is a super-2 number, since 2×157865565² = 49843073225538450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157865567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34654 + ... + 38943.

It is an arithmetic number, because the mean of its divisors is an integer number (9273348).

Almost surely, 2^157865565 is an apocalyptic number.

157865565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157865565 is a deficient number, since it is larger than the sum of its proper divisors (138881571).

157865565 is a wasteful number, since it uses less digits than its factorization.

157865565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73629.

The product of its digits is 1260000, while the sum is 48.

The square root of 157865565 is about 12564.4564148235. The cubic root of 157865565 is about 540.4586466913.

The spelling of 157865565 in words is "one hundred fifty-seven million, eight hundred sixty-five thousand, five hundred sixty-five".