55879611021 has 96 divisors (see below), whose sum is σ = 95196541440. Its totient is φ = 32471596224.

The previous prime is 55879610989. The next prime is 55879611037. The reversal of 55879611021 is 12011697855.

55879611021 is a `hidden beast` number, since 5 + 5 + 8 + 7 + 9 + 611 + 0 + 21 = 666.

It is not a de Polignac number, because 55879611021 - 2⁵ = 55879610989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55879611721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 20825946 + ... + 20828628.

It is an arithmetic number, because the mean of its divisors is an integer number (991630640).

Almost surely, 2^55879611021 is an apocalyptic number.

It is an amenable number.

55879611021 is a deficient number, since it is larger than the sum of its proper divisors (39316930419).

55879611021 is a wasteful number, since it uses less digits than its factorization.

55879611021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3077 (or 3065 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 45.

The spelling of 55879611021 in words is "fifty-five billion, eight hundred seventy-nine million, six hundred eleven thousand, twenty-one".