8115582520 has 32 divisors (see below), whose sum is σ = 18307036800. Its totient is φ = 3237881728.

The previous prime is 8115582493. The next prime is 8115582521. The reversal of 8115582520 is 252855118.

It is a self number, because there is not a number n which added to its sum of digits gives 8115582520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8115582521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245224 + ... + 276343.

It is an arithmetic number, because the mean of its divisors is an integer number (572094900).

Almost surely, 2^8115582520 is an apocalyptic number.

It is an amenable number.

8115582520 is an abundant number, since it is smaller than the sum of its proper divisors (10191454280).

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

8115582520 is a wasteful number, since it uses less digits than its factorization.

8115582520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521967 (or 521963 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 37.

The square root of 8115582520 is about 90086.5279606224. The cubic root of 8115582520 is about 2009.5858589184.

The spelling of 8115582520 in words is "eight billion, one hundred fifteen million, five hundred eighty-two thousand, five hundred twenty".