8640994975 has 24 divisors (see below), whose sum is σ = 11009764080. Its totient is φ = 6723552000.

The previous prime is 8640994949. The next prime is 8640994981. The reversal of 8640994975 is 5794990468.

It is not a de Polignac number, because 8640994975 - 2¹⁹ = 8640470687 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 326541 + ... + 352009.

It is an arithmetic number, because the mean of its divisors is an integer number (458740170).

Almost surely, 2^8640994975 is an apocalyptic number.

8640994975 is a deficient number, since it is larger than the sum of its proper divisors (2368769105).

8640994975 is a wasteful number, since it uses less digits than its factorization.

8640994975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25851 (or 25846 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 61.

The square root of 8640994975 is about 92956.9522682408. The cubic root of 8640994975 is about 2052.0499007348.

The spelling of 8640994975 in words is "eight billion, six hundred forty million, nine hundred ninety-four thousand, nine hundred seventy-five".