555561050561 has 12 divisors (see below), whose sum is σ = 616704146772. Its totient is φ = 500054940000.

The previous prime is 555561050537. The next prime is 555561050579. The reversal of 555561050561 is 165050165555.

It can be written as a sum of positive squares in 2 ways, for example, as 308396962225 + 247164088336 = 555335^2 + 497156^2 .

It is not a de Polignac number, because 555561050561 - 2²⁶ = 555493941697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (555561050531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22717550 + ... + 22741991.

It is an arithmetic number, because the mean of its divisors is an integer number (51392012231).

Almost surely, 2^555561050561 is an apocalyptic number.

It is an amenable number.

555561050561 is a deficient number, since it is larger than the sum of its proper divisors (61143096211).

555561050561 is a wasteful number, since it uses less digits than its factorization.

555561050561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45459664 (or 45459653 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 44.

The spelling of 555561050561 in words is "five hundred fifty-five billion, five hundred sixty-one million, fifty thousand, five hundred sixty-one".