50681715881 has 2 divisors, whose sum is σ = 50681715882. Its totient is φ = 50681715880.

The previous prime is 50681715871. The next prime is 50681715901. The reversal of 50681715881 is 18851718605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49157984656 + 1523731225 = 221716^2 + 39035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50681715881 is a prime.

It is a super-2 number, since 2×50681715881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (50681715871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25340857940 + 25340857941.

It is an arithmetic number, because the mean of its divisors is an integer number (25340857941).

Almost surely, 2^50681715881 is an apocalyptic number.

It is an amenable number.

50681715881 is a deficient number, since it is larger than the sum of its proper divisors (1).

50681715881 is an equidigital number, since it uses as much as digits as its factorization.

50681715881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 537600, while the sum is 50.

The spelling of 50681715881 in words is "fifty billion, six hundred eighty-one million, seven hundred fifteen thousand, eight hundred eighty-one".