55811935931 has 2 divisors, whose sum is σ = 55811935932. Its totient is φ = 55811935930.

The previous prime is 55811935919. The next prime is 55811935967. The reversal of 55811935931 is 13953911855.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55811935931 is a prime.

It is a super-2 number, since 2×55811935931² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55811935931.

It is not a weakly prime, because it can be changed into another prime (55811935331) 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 as a sum of consecutive naturals, namely, 27905967965 + 27905967966.

It is an arithmetic number, because the mean of its divisors is an integer number (27905967966).

Almost surely, 2^55811935931 is an apocalyptic number.

55811935931 is a deficient number, since it is larger than the sum of its proper divisors (1).

55811935931 is an equidigital number, since it uses as much as digits as its factorization.

55811935931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 729000, while the sum is 50.

The spelling of 55811935931 in words is "fifty-five billion, eight hundred eleven million, nine hundred thirty-five thousand, nine hundred thirty-one".