85840326641591 has 2 divisors, whose sum is σ = 85840326641592. Its totient is φ = 85840326641590.

The previous prime is 85840326641539. The next prime is 85840326641609. The reversal of 85840326641591 is 19514662304858.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85840326641591 is a prime.

It is a super-2 number, since 2×85840326641591² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85840326641501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42920163320795 + 42920163320796.

It is an arithmetic number, because the mean of its divisors is an integer number (42920163320796).

Almost surely, 2^{85840326641591} is an apocalyptic number.

85840326641591 is a deficient number, since it is larger than the sum of its proper divisors (1).

85840326641591 is an equidigital number, since it uses as much as digits as its factorization.

85840326641591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49766400, while the sum is 62.

The spelling of 85840326641591 in words is "eighty-five trillion, eight hundred forty billion, three hundred twenty-six million, six hundred forty-one thousand, five hundred ninety-one".