55717526991 has 16 divisors (see below), whose sum is σ = 85347422208. Its totient is φ = 31671890400.

The previous prime is 55717526989. The next prime is 55717527001. The reversal of 55717526991 is 19962571755.

It is not a de Polignac number, because 55717526991 - 2¹ = 55717526989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55717526191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6941580 + ... + 6949601.

It is an arithmetic number, because the mean of its divisors is an integer number (5334213888).

Almost surely, 2^55717526991 is an apocalyptic number.

55717526991 is a deficient number, since it is larger than the sum of its proper divisors (29629895217).

55717526991 is a wasteful number, since it uses less digits than its factorization.

55717526991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13891382.

The product of its digits is 5953500, while the sum is 57.

The spelling of 55717526991 in words is "fifty-five billion, seven hundred seventeen million, five hundred twenty-six thousand, nine hundred ninety-one".