55391915441418 has 16 divisors (see below), whose sum is σ = 113777988474720. Its totient is φ = 17964945548496.

The previous prime is 55391915441417. The next prime is 55391915441441. The reversal of 55391915441418 is 81414451919355.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (55391915441417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124756566088 + ... + 124756566531.

It is an arithmetic number, because the mean of its divisors is an integer number (7111124279670).

Almost surely, 2^{55391915441418} is an apocalyptic number.

55391915441418 is an abundant number, since it is smaller than the sum of its proper divisors (58386073033302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55391915441418 is a wasteful number, since it uses less digits than its factorization.

55391915441418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249513132661.

The product of its digits is 15552000, while the sum is 60.

The spelling of 55391915441418 in words is "fifty-five trillion, three hundred ninety-one billion, nine hundred fifteen million, four hundred forty-one thousand, four hundred eighteen".