55451544555 has 32 divisors (see below), whose sum is σ = 101882269440. Its totient is φ = 25470564480.

The previous prime is 55451544509. The next prime is 55451544569. The reversal of 55451544555 is 55544515455.

It is not a de Polignac number, because 55451544555 - 2¹⁹ = 55451020267 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8840812 + ... + 8847081.

It is an arithmetic number, because the mean of its divisors is an integer number (3183820920).

Almost surely, 2^55451544555 is an apocalyptic number.

55451544555 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55451544555 is a deficient number, since it is larger than the sum of its proper divisors (46430724885).

55451544555 is a wasteful number, since it uses less digits than its factorization.

55451544555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17687931.

The product of its digits is 5000000, while the sum is 48.

It can be divided in two parts, 55451 and 544555, that added together give a palindrome (600006).

The spelling of 55451544555 in words is "fifty-five billion, four hundred fifty-one million, five hundred forty-four thousand, five hundred fifty-five".