85091810408 has 64 divisors (see below), whose sum is σ = 174809128320. Its totient is φ = 38510035200.

The previous prime is 85091810389. The next prime is 85091810417. The reversal of 85091810408 is 80401819058.

It is a super-2 number, since 2×85091810408² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36347318 + ... + 36349658.

It is an arithmetic number, because the mean of its divisors is an integer number (2731392630).

Almost surely, 2^85091810408 is an apocalyptic number.

85091810408 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

85091810408 is an abundant number, since it is smaller than the sum of its proper divisors (89717317912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85091810408 is a wasteful number, since it uses less digits than its factorization.

85091810408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3978 (or 3974 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 44.

The spelling of 85091810408 in words is "eighty-five billion, ninety-one million, eight hundred ten thousand, four hundred eight".