50207661617 has 2 divisors, whose sum is σ = 50207661618. Its totient is φ = 50207661616.

The previous prime is 50207661613. The next prime is 50207661649. The reversal of 50207661617 is 71616670205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42026640016 + 8181021601 = 205004^2 + 90449^2 .

It is a cyclic number.

It is not a de Polignac number, because 50207661617 - 2² = 50207661613 is a prime.

It is not a weakly prime, because it can be changed into another prime (50207661613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25103830808 + 25103830809.

It is an arithmetic number, because the mean of its divisors is an integer number (25103830809).

Almost surely, 2^50207661617 is an apocalyptic number.

It is an amenable number.

50207661617 is a deficient number, since it is larger than the sum of its proper divisors (1).

50207661617 is an equidigital number, since it uses as much as digits as its factorization.

50207661617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 50207661617 in words is "fifty billion, two hundred seven million, six hundred sixty-one thousand, six hundred seventeen".