85902091057 has 2 divisors, whose sum is σ = 85902091058. Its totient is φ = 85902091056.

The previous prime is 85902091013. The next prime is 85902091087. The reversal of 85902091057 is 75019020958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83726894736 + 2175196321 = 289356^2 + 46639^2 .

It is a cyclic number.

It is not a de Polignac number, because 85902091057 - 2¹⁹ = 85901566769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85902090998 and 85902091016.

It is not a weakly prime, because it can be changed into another prime (85902091087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42951045528 + 42951045529.

It is an arithmetic number, because the mean of its divisors is an integer number (42951045529).

Almost surely, 2^85902091057 is an apocalyptic number.

It is an amenable number.

85902091057 is a deficient number, since it is larger than the sum of its proper divisors (1).

85902091057 is an equidigital number, since it uses as much as digits as its factorization.

85902091057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 46.

The spelling of 85902091057 in words is "eighty-five billion, nine hundred two million, ninety-one thousand, fifty-seven".