85945670621 has 2 divisors, whose sum is σ = 85945670622. Its totient is φ = 85945670620.

The previous prime is 85945670563. The next prime is 85945670623. The reversal of 85945670621 is 12607654958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78128635225 + 7817035396 = 279515^2 + 88414^2 .

It is a cyclic number.

It is not a de Polignac number, because 85945670621 - 2¹⁰ = 85945669597 is a prime.

It is a super-3 number, since 3×85945670621³ (a number of 34 digits) contains 333 as substring.

Together with 85945670623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85945670623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42972835310 + 42972835311.

It is an arithmetic number, because the mean of its divisors is an integer number (42972835311).

Almost surely, 2^85945670621 is an apocalyptic number.

It is an amenable number.

85945670621 is a deficient number, since it is larger than the sum of its proper divisors (1).

85945670621 is an equidigital number, since it uses as much as digits as its factorization.

85945670621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 53.

The spelling of 85945670621 in words is "eighty-five billion, nine hundred forty-five million, six hundred seventy thousand, six hundred twenty-one".