87664495636624 has 45 divisors (see below), whose sum is σ = 177557563285459. Its totient is φ = 41926085944160.

The previous prime is 87664495636621. The next prime is 87664495636637. The reversal of 87664495636624 is 42663659446678.

The square root of 87664495636624 is 9362932.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87664495636621) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 861338859 + ... + 861440629.

Almost surely, 2^{87664495636624} is an apocalyptic number.

87664495636624 is the 9362932-nd square number.

It is an amenable number.

87664495636624 is an abundant number, since it is smaller than the sum of its proper divisors (89893067648835).

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

87664495636624 is an frugal number, since it uses more digits than its factorization.

87664495636624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203596 (or 101796 counting only the distinct ones).

The product of its digits is 7524679680, while the sum is 76.

The spelling of 87664495636624 in words is "eighty-seven trillion, six hundred sixty-four billion, four hundred ninety-five million, six hundred thirty-six thousand, six hundred twenty-four".