85294113521 has 2 divisors, whose sum is σ = 85294113522. Its totient is φ = 85294113520.

The previous prime is 85294113503. The next prime is 85294113523. The reversal of 85294113521 is 12531149258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65871789025 + 19422324496 = 256655^2 + 139364^2 .

It is a cyclic number.

It is not a de Polignac number, because 85294113521 - 2³⁴ = 68114244337 is a prime.

Together with 85294113523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85294113523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42647056760 + 42647056761.

It is an arithmetic number, because the mean of its divisors is an integer number (42647056761).

Almost surely, 2^85294113521 is an apocalyptic number.

It is an amenable number.

85294113521 is a deficient number, since it is larger than the sum of its proper divisors (1).

85294113521 is an equidigital number, since it uses as much as digits as its factorization.

85294113521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 41.

The spelling of 85294113521 in words is "eighty-five billion, two hundred ninety-four million, one hundred thirteen thousand, five hundred twenty-one".