831775448770561 has 2 divisors, whose sum is σ = 831775448770562. Its totient is φ = 831775448770560.

The previous prime is 831775448770507. The next prime is 831775448770573. The reversal of 831775448770561 is 165077844577138.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 831268020494961 + 507428275600 = 28831719^2 + 712340^2 .

It is a cyclic number.

It is not a de Polignac number, because 831775448770561 - 2¹¹ = 831775448768513 is a prime.

It is not a weakly prime, because it can be changed into another prime (831775448773561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415887724385280 + 415887724385281.

It is an arithmetic number, because the mean of its divisors is an integer number (415887724385281).

Almost surely, 2^{831775448770561} is an apocalyptic number.

It is an amenable number.

831775448770561 is a deficient number, since it is larger than the sum of its proper divisors (1).

831775448770561 is an equidigital number, since it uses as much as digits as its factorization.

831775448770561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1106380800, while the sum is 73.

The spelling of 831775448770561 in words is "eight hundred thirty-one trillion, seven hundred seventy-five billion, four hundred forty-eight million, seven hundred seventy thousand, five hundred sixty-one".