85191758279 has 2 divisors, whose sum is σ = 85191758280. Its totient is φ = 85191758278.

The previous prime is 85191758237. The next prime is 85191758291. The reversal of 85191758279 is 97285719158.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85191758279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85191752279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42595879139 + 42595879140.

It is an arithmetic number, because the mean of its divisors is an integer number (42595879140).

Almost surely, 2^85191758279 is an apocalyptic number.

85191758279 is a deficient number, since it is larger than the sum of its proper divisors (1).

85191758279 is an equidigital number, since it uses as much as digits as its factorization.

85191758279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12700800, while the sum is 62.

The spelling of 85191758279 in words is "eighty-five billion, one hundred ninety-one million, seven hundred fifty-eight thousand, two hundred seventy-nine".