85447407625 has 16 divisors (see below), whose sum is σ = 107227555344. Its totient is φ = 67980240000.

The previous prime is 85447407613. The next prime is 85447407629. The reversal of 85447407625 is 52670474458.

It can be written as a sum of positive squares in 8 ways, for example, as 37235105296 + 48212302329 = 192964^2 + 219573^2 .

It is not a de Polignac number, because 85447407625 - 2⁷ = 85447407497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85447407629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1865716 + ... + 1910965.

It is an arithmetic number, because the mean of its divisors is an integer number (6701722209).

Almost surely, 2^85447407625 is an apocalyptic number.

It is an amenable number.

85447407625 is a deficient number, since it is larger than the sum of its proper divisors (21780147719).

85447407625 is a wasteful number, since it uses less digits than its factorization.

85447407625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3776877 (or 3776867 counting only the distinct ones).

The product of its (nonzero) digits is 7526400, while the sum is 52.

The spelling of 85447407625 in words is "eighty-five billion, four hundred forty-seven million, four hundred seven thousand, six hundred twenty-five".