8640899515 has 16 divisors (see below), whose sum is σ = 10998155520. Its totient is φ = 6498891360.

The previous prime is 8640899513. The next prime is 8640899549. The reversal of 8640899515 is 5159980468.

It is not a de Polignac number, because 8640899515 - 2¹ = 8640899513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8640899513) 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, 334719 + ... + 359608.

It is an arithmetic number, because the mean of its divisors is an integer number (687384720).

Almost surely, 2^8640899515 is an apocalyptic number.

8640899515 is a deficient number, since it is larger than the sum of its proper divisors (2357256005).

8640899515 is a wasteful number, since it uses less digits than its factorization.

8640899515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694482.

The product of its (nonzero) digits is 3110400, while the sum is 55.

The square root of 8640899515 is about 92956.4388033449. The cubic root of 8640899515 is about 2052.0423441434.

The spelling of 8640899515 in words is "eight billion, six hundred forty million, eight hundred ninety-nine thousand, five hundred fifteen".