85434470825 has 24 divisors (see below), whose sum is σ = 115583393856. Its totient is φ = 62126712000.

The previous prime is 85434470813. The next prime is 85434470857. The reversal of 85434470825 is 52807443458.

It is a de Polignac number, because none of the positive numbers 2^k-85434470825 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3456260 + ... + 3480890.

It is an arithmetic number, because the mean of its divisors is an integer number (4815974744).

Almost surely, 2^85434470825 is an apocalyptic number.

It is an amenable number.

85434470825 is a deficient number, since it is larger than the sum of its proper divisors (30148923031).

85434470825 is a wasteful number, since it uses less digits than its factorization.

85434470825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37265 (or 37260 counting only the distinct ones).

The product of its (nonzero) digits is 4300800, while the sum is 50.

The spelling of 85434470825 in words is "eighty-five billion, four hundred thirty-four million, four hundred seventy thousand, eight hundred twenty-five".