85184591957 has 2 divisors, whose sum is σ = 85184591958. Its totient is φ = 85184591956.

The previous prime is 85184591951. The next prime is 85184591971. The reversal of 85184591957 is 75919548158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83289382801 + 1895209156 = 288599^2 + 43534^2 .

It is a cyclic number.

It is not a de Polignac number, because 85184591957 - 2⁴ = 85184591941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85184591957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85184591951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42592295978 + 42592295979.

It is an arithmetic number, because the mean of its divisors is an integer number (42592295979).

Almost surely, 2^85184591957 is an apocalyptic number.

It is an amenable number.

85184591957 is a deficient number, since it is larger than the sum of its proper divisors (1).

85184591957 is an equidigital number, since it uses as much as digits as its factorization.

85184591957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144000, while the sum is 62.

The spelling of 85184591957 in words is "eighty-five billion, one hundred eighty-four million, five hundred ninety-one thousand, nine hundred fifty-seven".