85706018591 has 2 divisors, whose sum is σ = 85706018592. Its totient is φ = 85706018590.

The previous prime is 85706018581. The next prime is 85706018603. The reversal of 85706018591 is 19581060758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85706018591 - 2⁶ = 85706018527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85706018581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42853009295 + 42853009296.

It is an arithmetic number, because the mean of its divisors is an integer number (42853009296).

Almost surely, 2^85706018591 is an apocalyptic number.

85706018591 is a deficient number, since it is larger than the sum of its proper divisors (1).

85706018591 is an equidigital number, since it uses as much as digits as its factorization.

85706018591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 604800, while the sum is 50.

The spelling of 85706018591 in words is "eighty-five billion, seven hundred six million, eighteen thousand, five hundred ninety-one".