85191758291 has 2 divisors, whose sum is σ = 85191758292. Its totient is φ = 85191758290.

The previous prime is 85191758279. The next prime is 85191758303. The reversal of 85191758291 is 19285719158.

It is a balanced prime because it is at equal distance from previous prime (85191758279) and next prime (85191758303).

It is a cyclic number.

It is not a de Polignac number, because 85191758291 - 2¹⁸ = 85191496147 is a prime.

It is not a weakly prime, because it can be changed into another prime (85191758591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42595879145 + 42595879146.

It is an arithmetic number, because the mean of its divisors is an integer number (42595879146).

Almost surely, 2^85191758291 is an apocalyptic number.

85191758291 is a deficient number, since it is larger than the sum of its proper divisors (1).

85191758291 is an equidigital number, since it uses as much as digits as its factorization.

85191758291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 56.

The spelling of 85191758291 in words is "eighty-five billion, one hundred ninety-one million, seven hundred fifty-eight thousand, two hundred ninety-one".