85861236625 has 8 divisors (see below), whose sum is σ = 107154823464. Its totient is φ = 68688989200.

The previous prime is 85861236533. The next prime is 85861236661. The reversal of 85861236625 is 52663216858.

It can be written as a sum of positive squares in 4 ways, for example, as 5491254609 + 80369982016 = 74103^2 + 283496^2 .

It is a de Polignac number, because none of the positive numbers 2^k-85861236625 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343444822 + ... + 343445071.

It is an arithmetic number, because the mean of its divisors is an integer number (13394352933).

Almost surely, 2^85861236625 is an apocalyptic number.

It is an amenable number.

85861236625 is a deficient number, since it is larger than the sum of its proper divisors (21293586839).

85861236625 is an equidigital number, since it uses as much as digits as its factorization.

85861236625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686889908 (or 686889898 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 52.

The spelling of 85861236625 in words is "eighty-five billion, eight hundred sixty-one million, two hundred thirty-six thousand, six hundred twenty-five".