8515487664 has 80 divisors (see below), whose sum is σ = 24475343200. Its totient is φ = 2834694144.

The previous prime is 8515487653. The next prime is 8515487689. The reversal of 8515487664 is 4667845158.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 8515487664.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319392 + ... + 345024.

It is an arithmetic number, because the mean of its divisors is an integer number (305941790).

Almost surely, 2^8515487664 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 8515487664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12237671600).

8515487664 is an abundant number, since it is smaller than the sum of its proper divisors (15959855536).

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

8515487664 is a wasteful number, since it uses less digits than its factorization.

8515487664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26419 (or 26407 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 54.

The square root of 8515487664 is about 92279.3999980494. The cubic root of 8515487664 is about 2042.0663146291.

The spelling of 8515487664 in words is "eight billion, five hundred fifteen million, four hundred eighty-seven thousand, six hundred sixty-four".