85622668591 has 2 divisors, whose sum is σ = 85622668592. Its totient is φ = 85622668590.

The previous prime is 85622668543. The next prime is 85622668613. The reversal of 85622668591 is 19586622658.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85622668591 - 2⁷ = 85622668463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85622668091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42811334295 + 42811334296.

It is an arithmetic number, because the mean of its divisors is an integer number (42811334296).

Almost surely, 2^85622668591 is an apocalyptic number.

85622668591 is a deficient number, since it is larger than the sum of its proper divisors (1).

85622668591 is an equidigital number, since it uses as much as digits as its factorization.

85622668591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12441600, while the sum is 58.

The spelling of 85622668591 in words is "eighty-five billion, six hundred twenty-two million, six hundred sixty-eight thousand, five hundred ninety-one".