157157865 has 12 divisors (see below), whose sum is σ = 272407044. Its totient is φ = 83817504.

The previous prime is 157157863. The next prime is 157157881. The reversal of 157157865 is 568751751.

157157865 is a `hidden beast` number, since 1 + 5 + 71 + 578 + 6 + 5 = 666.

157157865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 104101209 + 53056656 = 10203^2 + 7284^2 .

It is not a de Polignac number, because 157157865 - 2¹ = 157157863 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 3492397 = 157157865 / (1 + 5 + 7 + 1 + 5 + 7 + 8 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 157157865.

It is not an unprimeable number, because it can be changed into a prime (157157863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1746154 + ... + 1746243.

It is an arithmetic number, because the mean of its divisors is an integer number (22700587).

Almost surely, 2^157157865 is an apocalyptic number.

157157865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157157865 is a deficient number, since it is larger than the sum of its proper divisors (115249179).

157157865 is a wasteful number, since it uses less digits than its factorization.

157157865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492408 (or 3492405 counting only the distinct ones).

The product of its digits is 294000, while the sum is 45.

The square root of 157157865 is about 12536.2620026864. The cubic root of 157157865 is about 539.6498244099.

The spelling of 157157865 in words is "one hundred fifty-seven million, one hundred fifty-seven thousand, eight hundred sixty-five".