55526578979 has 16 divisors (see below), whose sum is σ = 56132600832. Its totient is φ = 54924901248.

The previous prime is 55526578973. The next prime is 55526578981. The reversal of 55526578979 is 97987562555.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55526578979 is a prime.

It is a super-2 number, since 2×55526578979² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55526578973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28142237 + ... + 28144209.

It is an arithmetic number, because the mean of its divisors is an integer number (3508287552).

Almost surely, 2^55526578979 is an apocalyptic number.

55526578979 is a deficient number, since it is larger than the sum of its proper divisors (606021853).

55526578979 is a wasteful number, since it uses less digits than its factorization.

55526578979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926.

The product of its digits is 238140000, while the sum is 68.

The spelling of 55526578979 in words is "fifty-five billion, five hundred twenty-six million, five hundred seventy-eight thousand, nine hundred seventy-nine".