85840125617 has 4 divisors (see below), whose sum is σ = 85979251236. Its totient is φ = 85701000000.

The previous prime is 85840125607. The next prime is 85840125629. The reversal of 85840125617 is 71652104858.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12437602576 + 73402523041 = 111524^2 + 270929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85840125617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85840125607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69561884 + ... + 69563117.

It is an arithmetic number, because the mean of its divisors is an integer number (21494812809).

Almost surely, 2^85840125617 is an apocalyptic number.

It is an amenable number.

85840125617 is a deficient number, since it is larger than the sum of its proper divisors (139125619).

85840125617 is a wasteful number, since it uses less digits than its factorization.

85840125617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139125618.

The product of its (nonzero) digits is 537600, while the sum is 47.

The spelling of 85840125617 in words is "eighty-five billion, eight hundred forty million, one hundred twenty-five thousand, six hundred seventeen".