55011560661 has 6 divisors (see below), whose sum is σ = 79461143190. Its totient is φ = 36674373768.

The previous prime is 55011560657. The next prime is 55011560671. The reversal of 55011560661 is 16606511055.

It can be written as a sum of positive squares in only one way, i.e., 40684907025 + 14326653636 = 201705^2 + 119694^2 .

It is not a de Polignac number, because 55011560661 - 2² = 55011560657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55011560671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3056197806 + ... + 3056197823.

It is an arithmetic number, because the mean of its divisors is an integer number (13243523865).

Almost surely, 2^55011560661 is an apocalyptic number.

It is an amenable number.

55011560661 is a deficient number, since it is larger than the sum of its proper divisors (24449582529).

55011560661 is a wasteful number, since it uses less digits than its factorization.

55011560661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6112395635 (or 6112395632 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 55011560661 in words is "fifty-five billion, eleven million, five hundred sixty thousand, six hundred sixty-one".