8973398656 has 128 divisors (see below), whose sum is σ = 18924570000. Its totient is φ = 4233461760.

The previous prime is 8973398647. The next prime is 8973398683. The reversal of 8973398656 is 6568933798.

It can be written as a sum of positive squares in 8 ways, for example, as 3432085056 + 5541313600 = 58584^2 + 74440^2 .

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (64).

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, 25711570 + ... + 25711918.

Almost surely, 2^8973398656 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 8973398656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9462285000).

8973398656 is an abundant number, since it is smaller than the sum of its proper divisors (9951171344).

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

8973398656 is a wasteful number, since it uses less digits than its factorization.

8973398656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 538 counting only the distinct ones).

The product of its digits is 58786560, while the sum is 64.

The square root of 8973398656 is about 94728.0246600762. The cubic root of 8973398656 is about 2078.0324293092.

The spelling of 8973398656 in words is "eight billion, nine hundred seventy-three million, three hundred ninety-eight thousand, six hundred fifty-six".