56991426307199 has 12 divisors (see below), whose sum is σ = 59844210449856. Its totient is φ = 54269082766272.

The previous prime is 56991426307169. The next prime is 56991426307213. The reversal of 56991426307199 is 99170362419965.

It is a de Polignac number, because none of the positive numbers 2^k-56991426307199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56991426307169) 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, 241438682 + ... + 241674615.

It is an arithmetic number, because the mean of its divisors is an integer number (4987017537488).

Almost surely, 2^{56991426307199} is an apocalyptic number.

56991426307199 is a deficient number, since it is larger than the sum of its proper divisors (2852784142657).

56991426307199 is a wasteful number, since it uses less digits than its factorization.

56991426307199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483113566 (or 483113543 counting only the distinct ones).

The product of its (nonzero) digits is 198404640, while the sum is 71.

The spelling of 56991426307199 in words is "fifty-six trillion, nine hundred ninety-one billion, four hundred twenty-six million, three hundred seven thousand, one hundred ninety-nine".