85311565885 has 144 divisors (see below), whose sum is σ = 143747524800. Its totient is φ = 48140531712.

The previous prime is 85311565841. The next prime is 85311565931. The reversal of 85311565885 is 58856511358.

It is not a de Polignac number, because 85311565885 - 2¹¹ = 85311563837 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 13370626 + ... + 13377004.

It is an arithmetic number, because the mean of its divisors is an integer number (998246700).

Almost surely, 2^85311565885 is an apocalyptic number.

85311565885 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

85311565885 is a deficient number, since it is larger than the sum of its proper divisors (58435958915).

85311565885 is a wasteful number, since it uses less digits than its factorization.

85311565885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6460 (or 6440 counting only the distinct ones).

The product of its digits is 5760000, while the sum is 55.

The spelling of 85311565885 in words is "eighty-five billion, three hundred eleven million, five hundred sixty-five thousand, eight hundred eighty-five".