55818974479 has 4 divisors (see below), whose sum is σ = 59102443584. Its totient is φ = 52535505376.

The previous prime is 55818974423. The next prime is 55818974503. The reversal of 55818974479 is 97447981855.

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

It is a cyclic number.

It is not a de Polignac number, because 55818974479 - 2¹¹ = 55818972431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55818971479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641734527 + ... + 1641734560.

It is an arithmetic number, because the mean of its divisors is an integer number (14775610896).

Almost surely, 2^55818974479 is an apocalyptic number.

55818974479 is a deficient number, since it is larger than the sum of its proper divisors (3283469105).

55818974479 is a wasteful number, since it uses less digits than its factorization.

55818974479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283469104.

The product of its digits is 101606400, while the sum is 67.

The spelling of 55818974479 in words is "fifty-five billion, eight hundred eighteen million, nine hundred seventy-four thousand, four hundred seventy-nine".