7993564653998 has 64 divisors (see below), whose sum is σ = 14981467415040. Its totient is φ = 3107615222400.

The previous prime is 7993564653979. The next prime is 7993564654043. The reversal of 7993564653998 is 8993564653997.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 591102065 + ... + 591115587.

It is an arithmetic number, because the mean of its divisors is an integer number (234085428360).

Almost surely, 2^{7993564653998} is an apocalyptic number.

7993564653998 is a deficient number, since it is larger than the sum of its proper divisors (6987902761042).

7993564653998 is a wasteful number, since it uses less digits than its factorization.

7993564653998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21593.

The product of its digits is 11904278400, while the sum is 83.

Subtracting 7993564653998 from its reverse (8993564653997), we obtain a palindrome (999999999999).

The spelling of 7993564653998 in words is "seven trillion, nine hundred ninety-three billion, five hundred sixty-four million, six hundred fifty-three thousand, nine hundred ninety-eight".