85704557899 has 2 divisors, whose sum is σ = 85704557900. Its totient is φ = 85704557898.

The previous prime is 85704557863. The next prime is 85704557947. The reversal of 85704557899 is 99875540758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85704557899 - 2²³ = 85696169291 is a prime.

It is not a weakly prime, because it can be changed into another prime (85704557399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42852278949 + 42852278950.

It is an arithmetic number, because the mean of its divisors is an integer number (42852278950).

Almost surely, 2^85704557899 is an apocalyptic number.

85704557899 is a deficient number, since it is larger than the sum of its proper divisors (1).

85704557899 is an equidigital number, since it uses as much as digits as its factorization.

85704557899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008000, while the sum is 67.

The spelling of 85704557899 in words is "eighty-five billion, seven hundred four million, five hundred fifty-seven thousand, eight hundred ninety-nine".