85388465815 has 16 divisors (see below), whose sum is σ = 105119298720. Its totient is φ = 66562945920.

The previous prime is 85388465807. The next prime is 85388465857. The reversal of 85388465815 is 51856488358.

It is not a de Polignac number, because 85388465815 - 2³ = 85388465807 is a prime.

It is a super-2 number, since 2×85388465815² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1275600 + ... + 1340869.

It is an arithmetic number, because the mean of its divisors is an integer number (6569956170).

Almost surely, 2^85388465815 is an apocalyptic number.

85388465815 is a deficient number, since it is larger than the sum of its proper divisors (19730832905).

85388465815 is a wasteful number, since it uses less digits than its factorization.

85388465815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2616642.

The product of its digits is 36864000, while the sum is 61.

The spelling of 85388465815 in words is "eighty-five billion, three hundred eighty-eight million, four hundred sixty-five thousand, eight hundred fifteen".