50055565561 has 6 divisors (see below), whose sum is σ = 53173213550. Its totient is φ = 47111120256.

The previous prime is 50055565513. The next prime is 50055565579. The reversal of 50055565561 is 16556555005.

It can be written as a sum of positive squares in 3 ways, for example, as 35770535161 + 14285030400 = 189131^2 + 119520^2 .

It is not a de Polignac number, because 50055565561 - 2⁷ = 50055565433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50055565061) 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, 86601036 + ... + 86601613.

Almost surely, 2^50055565561 is an apocalyptic number.

It is an amenable number.

50055565561 is a deficient number, since it is larger than the sum of its proper divisors (3117647989).

50055565561 is a wasteful number, since it uses less digits than its factorization.

50055565561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173202683 (or 173202666 counting only the distinct ones).

The product of its (nonzero) digits is 562500, while the sum is 43.

The spelling of 50055565561 in words is "fifty billion, fifty-five million, five hundred sixty-five thousand, five hundred sixty-one".