85708136865 has 32 divisors (see below), whose sum is σ = 149461038720. Its totient is φ = 41686396416.

The previous prime is 85708136863. The next prime is 85708136869. The reversal of 85708136865 is 56863180758.

It is not a de Polignac number, because 85708136865 - 2¹ = 85708136863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85708136863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2631580 + ... + 2663949.

It is an arithmetic number, because the mean of its divisors is an integer number (4670657460).

Almost surely, 2^85708136865 is an apocalyptic number.

It is an amenable number.

85708136865 is a deficient number, since it is larger than the sum of its proper divisors (63752901855).

85708136865 is a wasteful number, since it uses less digits than its factorization.

85708136865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5295633.

The product of its (nonzero) digits is 9676800, while the sum is 57.

The spelling of 85708136865 in words is "eighty-five billion, seven hundred eight million, one hundred thirty-six thousand, eight hundred sixty-five".