50456891557 has 2 divisors, whose sum is σ = 50456891558. Its totient is φ = 50456891556.

The previous prime is 50456891489. The next prime is 50456891621. The reversal of 50456891557 is 75519865405.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30865570596 + 19591320961 = 175686^2 + 139969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50456891557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50456891498 and 50456891507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50456891357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25228445778 + 25228445779.

It is an arithmetic number, because the mean of its divisors is an integer number (25228445779).

Almost surely, 2^50456891557 is an apocalyptic number.

It is an amenable number.

50456891557 is a deficient number, since it is larger than the sum of its proper divisors (1).

50456891557 is an equidigital number, since it uses as much as digits as its factorization.

50456891557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560000, while the sum is 55.

The spelling of 50456891557 in words is "fifty billion, four hundred fifty-six million, eight hundred ninety-one thousand, five hundred fifty-seven".