85625707771 has 2 divisors, whose sum is σ = 85625707772. Its totient is φ = 85625707770.

The previous prime is 85625707759. The next prime is 85625707787. The reversal of 85625707771 is 17770752658.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85625707771 is a prime.

It is not a weakly prime, because it can be changed into another prime (85625707721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42812853885 + 42812853886.

It is an arithmetic number, because the mean of its divisors is an integer number (42812853886).

Almost surely, 2^85625707771 is an apocalyptic number.

85625707771 is a deficient number, since it is larger than the sum of its proper divisors (1).

85625707771 is an equidigital number, since it uses as much as digits as its factorization.

85625707771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5762400, while the sum is 55.

The spelling of 85625707771 in words is "eighty-five billion, six hundred twenty-five million, seven hundred seven thousand, seven hundred seventy-one".