85840326641731 has 2 divisors, whose sum is σ = 85840326641732. Its totient is φ = 85840326641730.

The previous prime is 85840326641723. The next prime is 85840326641777. The reversal of 85840326641731 is 13714662304858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85840326641731 - 2³ = 85840326641723 is a prime.

It is a super-2 number, since 2×85840326641731² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85840326641131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42920163320865 + 42920163320866.

It is an arithmetic number, because the mean of its divisors is an integer number (42920163320866).

Almost surely, 2^{85840326641731} is an apocalyptic number.

85840326641731 is a deficient number, since it is larger than the sum of its proper divisors (1).

85840326641731 is an equidigital number, since it uses as much as digits as its factorization.

85840326641731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 85840326641731 in words is "eighty-five trillion, eight hundred forty billion, three hundred twenty-six million, six hundred forty-one thousand, seven hundred thirty-one".