50055543581 has 2 divisors, whose sum is σ = 50055543582. Its totient is φ = 50055543580.

The previous prime is 50055543569. The next prime is 50055543599. The reversal of 50055543581 is 18534555005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49956720100 + 98823481 = 223510^2 + 9941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50055543581 is a prime.

It is a super-2 number, since 2×50055543581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50055543281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25027771790 + 25027771791.

It is an arithmetic number, because the mean of its divisors is an integer number (25027771791).

Almost surely, 2^50055543581 is an apocalyptic number.

It is an amenable number.

50055543581 is a deficient number, since it is larger than the sum of its proper divisors (1).

50055543581 is an equidigital number, since it uses as much as digits as its factorization.

50055543581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 300000, while the sum is 41.

The spelling of 50055543581 in words is "fifty billion, fifty-five million, five hundred forty-three thousand, five hundred eighty-one".