91834018254857 has 6 divisors (see below), whose sum is σ = 94128502948254. Its totient is φ = 89594164149440.

The previous prime is 91834018254767. The next prime is 91834018254919. The reversal of 91834018254857 is 75845281043819.

It can be written as a sum of positive squares in 3 ways, for example, as 2367031482256 + 89466986772601 = 1538516^2 + 9458699^2 .

It is not a de Polignac number, because 91834018254857 - 2¹⁰ = 91834018253833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91834018254793 and 91834018254802.

It is not an unprimeable number, because it can be changed into a prime (91834018254457) 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 in 5 ways as a sum of consecutive naturals, for example, 27315292268 + ... + 27315295629.

It is an arithmetic number, because the mean of its divisors is an integer number (15688083824709).

Almost surely, 2^{91834018254857} is an apocalyptic number.

It is an amenable number.

91834018254857 is a deficient number, since it is larger than the sum of its proper divisors (2294484693397).

91834018254857 is an equidigital number, since it uses as much as digits as its factorization.

91834018254857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54630587979 (or 54630587938 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 65.

The spelling of 91834018254857 in words is "ninety-one trillion, eight hundred thirty-four billion, eighteen million, two hundred fifty-four thousand, eight hundred fifty-seven".