85865321507825 has 12 divisors (see below), whose sum is σ = 106475902797660. Its totient is φ = 68690383575360.

The previous prime is 85865321507813. The next prime is 85865321507837. The reversal of 85865321507825 is 52870512356858.

It is an interprime number because it is at equal distance from previous prime (85865321507813) and next prime (85865321507837).

It can be written as a sum of positive squares in 6 ways, for example, as 16418282594704 + 69447038913121 = 4051948^2 + 8333489^2 .

It is not a de Polignac number, because 85865321507825 - 2⁶ = 85865321507761 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45905510 + ... + 47739359.

It is an arithmetic number, because the mean of its divisors is an integer number (8872991899805).

Almost surely, 2^{85865321507825} is an apocalyptic number.

It is an amenable number.

85865321507825 is a deficient number, since it is larger than the sum of its proper divisors (20610581289835).

85865321507825 is a wasteful number, since it uses less digits than its factorization.

85865321507825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93681556 (or 93681551 counting only the distinct ones).

The product of its (nonzero) digits is 161280000, while the sum is 65.

The spelling of 85865321507825 in words is "eighty-five trillion, eight hundred sixty-five billion, three hundred twenty-one million, five hundred seven thousand, eight hundred twenty-five".