56991922919965 has 8 divisors (see below), whose sum is σ = 74607608186208. Its totient is φ = 41448671214480.

The previous prime is 56991922919963. The next prime is 56991922919983.

56991922919965 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56991922919965 - 2¹ = 56991922919963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56991922919963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518108390127 + ... + 518108390236.

It is an arithmetic number, because the mean of its divisors is an integer number (9325951023276).

Almost surely, 2^{56991922919965} is an apocalyptic number.

56991922919965 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56991922919965 is a deficient number, since it is larger than the sum of its proper divisors (17615685266243).

56991922919965 is a wasteful number, since it uses less digits than its factorization.

56991922919965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036216780379.

The product of its digits is 1913187600, while the sum is 82.

The spelling of 56991922919965 in words is "fifty-six trillion, nine hundred ninety-one billion, nine hundred twenty-two million, nine hundred nineteen thousand, nine hundred sixty-five".