50809726813 has 2 divisors, whose sum is σ = 50809726814. Its totient is φ = 50809726812.

The previous prime is 50809726763. The next prime is 50809726819. The reversal of 50809726813 is 31862790805.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39633642724 + 11176084089 = 199082^2 + 105717^2 .

It is a cyclic number.

It is not a de Polignac number, because 50809726813 - 2²⁹ = 50272855901 is a prime.

It is a super-2 number, since 2×50809726813² (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 (50809726819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25404863406 + 25404863407.

It is an arithmetic number, because the mean of its divisors is an integer number (25404863407).

Almost surely, 2^50809726813 is an apocalyptic number.

It is an amenable number.

50809726813 is a deficient number, since it is larger than the sum of its proper divisors (1).

50809726813 is an equidigital number, since it uses as much as digits as its factorization.

50809726813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 50809726813 in words is "fifty billion, eight hundred nine million, seven hundred twenty-six thousand, eight hundred thirteen".