50505555561 has 16 divisors (see below), whose sum is σ = 71306656128. Its totient is φ = 31687673600.

The previous prime is 50505555559. The next prime is 50505555571. The reversal of 50505555561 is 16555550505.

It is not a de Polignac number, because 50505555561 - 2¹ = 50505555559 is a prime.

It is a super-2 number, since 2×50505555561² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (50505555511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1207051 + ... + 1248191.

It is an arithmetic number, because the mean of its divisors is an integer number (4456666008).

Almost surely, 2^50505555561 is an apocalyptic number.

50505555561 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

50505555561 is a deficient number, since it is larger than the sum of its proper divisors (20801100567).

50505555561 is a wasteful number, since it uses less digits than its factorization.

50505555561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65232.

The product of its (nonzero) digits is 468750, while the sum is 42.

The spelling of 50505555561 in words is "fifty billion, five hundred five million, five hundred fifty-five thousand, five hundred sixty-one".