55555549999999 has 16 divisors (see below), whose sum is σ = 65540605911040. Its totient is φ = 46082650870080.

The previous prime is 55555549999853. The next prime is 55555550000017. The reversal of 55555549999999 is 99999994555555.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55555549999999 is a prime.

It is a Duffinian number.

55555549999999 is a modest number, since divided by 9999999 gives 5555554 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 55555549999999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555549990999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37411387 + ... + 38868019.

It is an arithmetic number, because the mean of its divisors is an integer number (4096287869440).

Almost surely, 2^{55555549999999} is an apocalyptic number.

55555549999999 is a deficient number, since it is larger than the sum of its proper divisors (9985055911041).

55555549999999 is a wasteful number, since it uses less digits than its factorization.

55555549999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632430.

The product of its digits is 298935562500, while the sum is 97.

The spelling of 55555549999999 in words is "fifty-five trillion, five hundred fifty-five billion, five hundred forty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".