8157122660 has 24 divisors (see below), whose sum is σ = 17134649280. Its totient is φ = 3261955424.

The previous prime is 8157122653. The next prime is 8157122671. The reversal of 8157122660 is 662217518.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21617 + ... + 129543.

It is an arithmetic number, because the mean of its divisors is an integer number (713943720).

Almost surely, 2^8157122660 is an apocalyptic number.

It is an amenable number.

8157122660 is an abundant number, since it is smaller than the sum of its proper divisors (8977526620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8157122660 is a wasteful number, since it uses less digits than its factorization.

8157122660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111715 (or 111713 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 8157122660 is about 90316.7905762821. The cubic root of 8157122660 is about 2013.0087576585.

The spelling of 8157122660 in words is "eight billion, one hundred fifty-seven million, one hundred twenty-two thousand, six hundred sixty".