7791971564493 has 12 divisors (see below), whose sum is σ = 11255167852188. Its totient is φ = 5194602564480.

The previous prime is 7791971564491. The next prime is 7791971564501. The reversal of 7791971564493 is 3944651791977.

7791971564493 is a `hidden beast` number, since 7 + 7 + 9 + 1 + 9 + 71 + 5 + 64 + 493 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3425823406404 + 4366148158089 = 1850898^2 + 2089533^2 .

It is not a de Polignac number, because 7791971564493 - 2¹ = 7791971564491 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7791971564491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2651730 + ... + 4755587.

It is an arithmetic number, because the mean of its divisors is an integer number (937930654349).

Almost surely, 2^{7791971564493} is an apocalyptic number.

It is an amenable number.

7791971564493 is a deficient number, since it is larger than the sum of its proper divisors (3463196287695).

7791971564493 is a wasteful number, since it uses less digits than its factorization.

7791971564493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524204 (or 7524201 counting only the distinct ones).

The product of its digits is 360067680, while the sum is 72.

The spelling of 7791971564493 in words is "seven trillion, seven hundred ninety-one billion, nine hundred seventy-one million, five hundred sixty-four thousand, four hundred ninety-three".