8115994656 has 540 divisors, whose sum is σ = 29900243646. Its totient is φ = 2086318080.

The previous prime is 8115994643. The next prime is 8115994693. The reversal of 8115994656 is 6564995118.

8115994656 is a `hidden beast` number, since 8 + 1 + 1 + 599 + 46 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7070119056 + 1045875600 = 84084^2 + 32340^2 .

Its product of digits (2332800) is a multiple of the sum of its prime divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 83670000 + ... + 83670096.

Almost surely, 2^8115994656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8115994656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14950121823).

8115994656 is an abundant number, since it is smaller than the sum of its proper divisors (21784248990).

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

8115994656 is a wasteful number, since it uses less digits than its factorization.

8115994656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 120 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 54.

The square root of 8115994656 is about 90088.8153768269. The cubic root of 8115994656 is about 2009.6198761380.

The spelling of 8115994656 in words is "eight billion, one hundred fifteen million, nine hundred ninety-four thousand, six hundred fifty-six".