55617222789 has 24 divisors (see below), whose sum is σ = 82576435032. Its totient is φ = 36050273280.

The previous prime is 55617222761. The next prime is 55617222799. The reversal of 55617222789 is 98722271655.

55617222789 is a `hidden beast` number, since 5 + 561 + 7 + 2 + 2 + 2 + 78 + 9 = 666.

55617222789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1963376100 + 53653846689 = 44310^2 + 231633^2 .

It is not a de Polignac number, because 55617222789 - 2³² = 51322255493 is a prime.

It is a super-2 number, since 2×55617222789² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55617222799) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149092 + ... + 365325.

It is an arithmetic number, because the mean of its divisors is an integer number (3440684793).

Almost surely, 2^55617222789 is an apocalyptic number.

It is an amenable number.

55617222789 is a deficient number, since it is larger than the sum of its proper divisors (26959212243).

55617222789 is a wasteful number, since it uses less digits than its factorization.

55617222789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514757 (or 514754 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The spelling of 55617222789 in words is "fifty-five billion, six hundred seventeen million, two hundred twenty-two thousand, seven hundred eighty-nine".