555115065561 has 24 divisors (see below), whose sum is σ = 956660886240. Its totient is φ = 317208608136.

The previous prime is 555115065529. The next prime is 555115065607. The reversal of 555115065561 is 165560511555.

It is not a de Polignac number, because 555115065561 - 2⁵ = 555115065529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (555115065161) 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, 209792731 + ... + 209795376.

It is an arithmetic number, because the mean of its divisors is an integer number (39860870260).

Almost surely, 2^555115065561 is an apocalyptic number.

It is an amenable number.

555115065561 is a deficient number, since it is larger than the sum of its proper divisors (401545820679).

555115065561 is a wasteful number, since it uses less digits than its factorization.

555115065561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419588130 (or 419588117 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 45.

The spelling of 555115065561 in words is "five hundred fifty-five billion, one hundred fifteen million, sixty-five thousand, five hundred sixty-one".