55578976579 has 4 divisors (see below), whose sum is σ = 63518830384. Its totient is φ = 47639122776.

The previous prime is 55578976549. The next prime is 55578976633. The reversal of 55578976579 is 97567987555.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55578976579 - 2¹³ = 55578968387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55578976549) 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 3 ways as a sum of consecutive naturals, for example, 3969926892 + ... + 3969926905.

It is an arithmetic number, because the mean of its divisors is an integer number (15879707596).

Almost surely, 2^55578976579 is an apocalyptic number.

55578976579 is a deficient number, since it is larger than the sum of its proper divisors (7939853805).

55578976579 is an equidigital number, since it uses as much as digits as its factorization.

55578976579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7939853804.

The product of its digits is 833490000, while the sum is 73.

The spelling of 55578976579 in words is "fifty-five billion, five hundred seventy-eight million, nine hundred seventy-six thousand, five hundred seventy-nine".