55110561099 has 16 divisors (see below), whose sum is σ = 80190888960. Its totient is φ = 33387809760.

The previous prime is 55110561097. The next prime is 55110561127. The reversal of 55110561099 is 99016501155.

It is not a de Polignac number, because 55110561099 - 2¹ = 55110561097 is a prime.

It is a super-2 number, since 2×55110561099² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55110561099.

It is not an unprimeable number, because it can be changed into a prime (55110561091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223579 + ... + 400260.

It is an arithmetic number, because the mean of its divisors is an integer number (5011930560).

Almost surely, 2^55110561099 is an apocalyptic number.

55110561099 is a deficient number, since it is larger than the sum of its proper divisors (25080327861).

55110561099 is a wasteful number, since it uses less digits than its factorization.

55110561099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626530.

The product of its (nonzero) digits is 60750, while the sum is 42.

It can be divided in two parts, 5511056 and 1099, that added together give a palindrome (5512155).

The spelling of 55110561099 in words is "fifty-five billion, one hundred ten million, five hundred sixty-one thousand, ninety-nine".