8638508669956 has 27 divisors (see below), whose sum is σ = 16616759858517. Its totient is φ = 3926565458640.

The previous prime is 8638508669927. The next prime is 8638508669977. The reversal of 8638508669956 is 6599668058368.

The square root of 8638508669956 is 2939134.

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

It can be written as a sum of positive squares in only one way, i.e., 6629440552900 + 2009068117056 = 2574770^2 + 1417416^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 64594150 + ... + 64727746.

Almost surely, 2^{8638508669956} is an apocalyptic number.

8638508669956 is the 2939134-th square number.

It is an amenable number.

8638508669956 is a deficient number, since it is larger than the sum of its proper divisors (7978251188561).

8638508669956 is an frugal number, since it uses more digits than its factorization.

8638508669956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267220 (or 133610 counting only the distinct ones).

The product of its (nonzero) digits is 4031078400, while the sum is 79.

The spelling of 8638508669956 in words is "eight trillion, six hundred thirty-eight billion, five hundred eight million, six hundred sixty-nine thousand, nine hundred fifty-six".