7987812516 has 24 divisors (see below), whose sum is σ = 20709143840. Its totient is φ = 2662604136.

The previous prime is 7987812487. The next prime is 7987812517. The reversal of 7987812516 is 6152187897.

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

It is not an unprimeable number, because it can be changed into a prime (7987812517) 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, 36980506 + ... + 36980721.

Almost surely, 2^7987812516 is an apocalyptic number.

It is an amenable number.

7987812516 is an abundant number, since it is smaller than the sum of its proper divisors (12721331324).

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

7987812516 is a wasteful number, since it uses less digits than its factorization.

7987812516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73961240 (or 73961232 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 54.

The square root of 7987812516 is about 89374.5630255052. The cubic root of 7987812516 is about 1998.9838601507.

The spelling of 7987812516 in words is "seven billion, nine hundred eighty-seven million, eight hundred twelve thousand, five hundred sixteen".