55742615279 has 4 divisors (see below), whose sum is σ = 60030508776. Its totient is φ = 51454721784.

The previous prime is 55742615233. The next prime is 55742615293. The reversal of 55742615279 is 97251624755.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55742615279 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55742615279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55742615209) 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, 2143946729 + ... + 2143946754.

It is an arithmetic number, because the mean of its divisors is an integer number (15007627194).

Almost surely, 2^55742615279 is an apocalyptic number.

55742615279 is a deficient number, since it is larger than the sum of its proper divisors (4287893497).

55742615279 is a wasteful number, since it uses less digits than its factorization.

55742615279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287893496.

The product of its digits is 5292000, while the sum is 53.

The spelling of 55742615279 in words is "fifty-five billion, seven hundred forty-two million, six hundred fifteen thousand, two hundred seventy-nine".