55505499979 has 8 divisors (see below), whose sum is σ = 55804584528. Its totient is φ = 55206590880.

The previous prime is 55505499937. The next prime is 55505499991. The reversal of 55505499979 is 97999450555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55505499979 - 2²⁵ = 55471945547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55505409979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617269 + ... + 701449.

It is an arithmetic number, because the mean of its divisors is an integer number (6975573066).

Almost surely, 2^55505499979 is an apocalyptic number.

55505499979 is a deficient number, since it is larger than the sum of its proper divisors (299084549).

55505499979 is a wasteful number, since it uses less digits than its factorization.

55505499979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87725.

The product of its (nonzero) digits is 114817500, while the sum is 67.

The spelling of 55505499979 in words is "fifty-five billion, five hundred five million, four hundred ninety-nine thousand, nine hundred seventy-nine".