50126910781 has 2 divisors, whose sum is σ = 50126910782. Its totient is φ = 50126910780.

The previous prime is 50126910767. The next prime is 50126910791. The reversal of 50126910781 is 18701962105.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32632616025 + 17494294756 = 180645^2 + 132266^2 .

It is a cyclic number.

It is not a de Polignac number, because 50126910781 - 2⁹ = 50126910269 is a prime.

It is a super-2 number, since 2×50126910781² (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 (50126910791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25063455390 + 25063455391.

It is an arithmetic number, because the mean of its divisors is an integer number (25063455391).

Almost surely, 2^50126910781 is an apocalyptic number.

It is an amenable number.

50126910781 is a deficient number, since it is larger than the sum of its proper divisors (1).

50126910781 is an equidigital number, since it uses as much as digits as its factorization.

50126910781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 40.

The spelling of 50126910781 in words is "fifty billion, one hundred twenty-six million, nine hundred ten thousand, seven hundred eighty-one".