50819235581 has 2 divisors, whose sum is σ = 50819235582. Its totient is φ = 50819235580.

The previous prime is 50819235569. The next prime is 50819235619. The reversal of 50819235581 is 18553291805.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45075111481 + 5744124100 = 212309^2 + 75790^2 .

It is a cyclic number.

It is not a de Polignac number, because 50819235581 - 2¹⁴ = 50819219197 is a prime.

It is a super-2 number, since 2×50819235581² (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 (50819235521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25409617790 + 25409617791.

It is an arithmetic number, because the mean of its divisors is an integer number (25409617791).

Almost surely, 2^50819235581 is an apocalyptic number.

It is an amenable number.

50819235581 is a deficient number, since it is larger than the sum of its proper divisors (1).

50819235581 is an equidigital number, since it uses as much as digits as its factorization.

50819235581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432000, while the sum is 47.

The spelling of 50819235581 in words is "fifty billion, eight hundred nineteen million, two hundred thirty-five thousand, five hundred eighty-one".