55117311647 has 4 divisors (see below), whose sum is σ = 55538054616. Its totient is φ = 54696568680.

The previous prime is 55117311563. The next prime is 55117311661. The reversal of 55117311647 is 74611371155.

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 55117311647 - 2¹⁰ = 55117310623 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 (55117311047) 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, 210371288 + ... + 210371549.

It is an arithmetic number, because the mean of its divisors is an integer number (13884513654).

Almost surely, 2^55117311647 is an apocalyptic number.

55117311647 is a deficient number, since it is larger than the sum of its proper divisors (420742969).

55117311647 is a wasteful number, since it uses less digits than its factorization.

55117311647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420742968.

The product of its digits is 88200, while the sum is 41.

The spelling of 55117311647 in words is "fifty-five billion, one hundred seventeen million, three hundred eleven thousand, six hundred forty-seven".