55208487817 has 12 divisors (see below), whose sum is σ = 64241250816. Its totient is φ = 47307463560.

The previous prime is 55208487787. The next prime is 55208487839. The reversal of 55208487817 is 71878480255.

It is not a de Polignac number, because 55208487817 - 2²⁷ = 55074270089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55208487877) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28 + ... + 332290.

It is an arithmetic number, because the mean of its divisors is an integer number (5353437568).

Almost surely, 2^55208487817 is an apocalyptic number.

It is an amenable number.

55208487817 is a deficient number, since it is larger than the sum of its proper divisors (9032762999).

55208487817 is a wasteful number, since it uses less digits than its factorization.

55208487817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335668 (or 335661 counting only the distinct ones).

The product of its (nonzero) digits is 5017600, while the sum is 55.

The spelling of 55208487817 in words is "fifty-five billion, two hundred eight million, four hundred eighty-seven thousand, eight hundred seventeen".