85622668091 has 2 divisors, whose sum is σ = 85622668092. Its totient is φ = 85622668090.

The previous prime is 85622668069. The next prime is 85622668111. The reversal of 85622668091 is 19086622658.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85622668091 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (85622668591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42811334045 + 42811334046.

It is an arithmetic number, because the mean of its divisors is an integer number (42811334046).

Almost surely, 2^85622668091 is an apocalyptic number.

85622668091 is a deficient number, since it is larger than the sum of its proper divisors (1).

85622668091 is an equidigital number, since it uses as much as digits as its factorization.

85622668091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 85622668091 in words is "eighty-five billion, six hundred twenty-two million, six hundred sixty-eight thousand, ninety-one".