7985731764864 has 64 divisors (see below), whose sum is σ = 24242400008640. Its totient is φ = 2281637646336.

The previous prime is 7985731764823. The next prime is 7985731764929. The reversal of 7985731764864 is 4684671375897.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1485438489 + ... + 1485443864.

It is an arithmetic number, because the mean of its divisors is an integer number (378787500135).

Almost surely, 2^{7985731764864} is an apocalyptic number.

It is an amenable number.

7985731764864 is an abundant number, since it is smaller than the sum of its proper divisors (16256668243776).

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

7985731764864 is a wasteful number, since it uses less digits than its factorization.

7985731764864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970882377 (or 2970882365 counting only the distinct ones).

The product of its digits is 1706987520, while the sum is 75.

The spelling of 7985731764864 in words is "seven trillion, nine hundred eighty-five billion, seven hundred thirty-one million, seven hundred sixty-four thousand, eight hundred sixty-four".