55000110605561 has 24 divisors (see below), whose sum is σ = 61371811264680. Its totient is φ = 49245932257280.

The previous prime is 55000110605521. The next prime is 55000110605591. The reversal of 55000110605561 is 16550601100055.

It can be written as a sum of positive squares in 4 ways, for example, as 2452747515625 + 52547363089936 = 1566125^2 + 7248956^2 .

It is not a de Polignac number, because 55000110605561 - 2⁶ = 55000110605497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55000110605521) 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, 7168676 + ... + 12703941.

It is an arithmetic number, because the mean of its divisors is an integer number (2557158802695).

Almost surely, 2^{55000110605561} is an apocalyptic number.

It is an amenable number.

55000110605561 is a deficient number, since it is larger than the sum of its proper divisors (6371700659119).

55000110605561 is a wasteful number, since it uses less digits than its factorization.

55000110605561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19872985 (or 19872974 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 55000110605561 in words is "fifty-five trillion, one hundred ten million, six hundred five thousand, five hundred sixty-one".