8394978984964 has 48 divisors (see below), whose sum is σ = 17395509712896. Its totient is φ = 3494633587200.

The previous prime is 8394978984947. The next prime is 8394978984989. The reversal of 8394978984964 is 4694898794938.

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, 57708997 + ... + 57854284.

It is an arithmetic number, because the mean of its divisors is an integer number (362406452352).

Almost surely, 2^{8394978984964} is an apocalyptic number.

It is an amenable number.

8394978984964 is an abundant number, since it is smaller than the sum of its proper divisors (9000530727932).

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

8394978984964 is a wasteful number, since it uses less digits than its factorization.

8394978984964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115563436 (or 115563434 counting only the distinct ones).

The product of its digits is 27088846848, while the sum is 88.

The spelling of 8394978984964 in words is "eight trillion, three hundred ninety-four billion, nine hundred seventy-eight million, nine hundred eighty-four thousand, nine hundred sixty-four".