85717387647 has 8 divisors (see below), whose sum is σ = 126988722480. Its totient is φ = 57144925080.

The previous prime is 85717387621. The next prime is 85717387649. The reversal of 85717387647 is 74678371758.

It is not a de Polignac number, because 85717387647 - 2⁷ = 85717387519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85717387649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1587359004 + ... + 1587359057.

It is an arithmetic number, because the mean of its divisors is an integer number (15873590310).

Almost surely, 2^85717387647 is an apocalyptic number.

85717387647 is a deficient number, since it is larger than the sum of its proper divisors (41271334833).

85717387647 is a wasteful number, since it uses less digits than its factorization.

85717387647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174718070 (or 3174718064 counting only the distinct ones).

The product of its digits is 55319040, while the sum is 63.

The spelling of 85717387647 in words is "eighty-five billion, seven hundred seventeen million, three hundred eighty-seven thousand, six hundred forty-seven".