8517887157 has 16 divisors (see below), whose sum is σ = 12515252288. Its totient is φ = 5119873920.

The previous prime is 8517887087. The next prime is 8517887159. The reversal of 8517887157 is 7517887158.

It is a happy number.

It is not a de Polignac number, because 8517887157 - 2¹¹ = 8517885109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8517887097 and 8517887106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8517887159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2537944 + ... + 2541297.

It is an arithmetic number, because the mean of its divisors is an integer number (782203268).

Almost surely, 2^8517887157 is an apocalyptic number.

It is an amenable number.

8517887157 is a deficient number, since it is larger than the sum of its proper divisors (3997365131).

8517887157 is a wasteful number, since it uses less digits than its factorization.

8517887157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5079300.

The product of its digits is 4390400, while the sum is 57.

The square root of 8517887157 is about 92292.4003209365. The cubic root of 8517887157 is about 2042.2581010094.

Subtracting from 8517887157 its reverse (7517887158), we obtain a palindrome (999999999).

The spelling of 8517887157 in words is "eight billion, five hundred seventeen million, eight hundred eighty-seven thousand, one hundred fifty-seven".