85107815860 has 36 divisors (see below), whose sum is σ = 186835007268. Its totient is φ = 32562986368.

The previous prime is 85107815857. The next prime is 85107815861. The reversal of 85107815860 is 6851870158.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30780597136 + 54327218724 = 175444^2 + 233082^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85107815861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4011529 + ... + 4032688.

It is an arithmetic number, because the mean of its divisors is an integer number (5189861313).

Almost surely, 2^85107815860 is an apocalyptic number.

It is an amenable number.

85107815860 is an abundant number, since it is smaller than the sum of its proper divisors (101727191408).

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

85107815860 is a wasteful number, since it uses less digits than its factorization.

85107815860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8044272 (or 8044247 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 49.

The spelling of 85107815860 in words is "eighty-five billion, one hundred seven million, eight hundred fifteen thousand, eight hundred sixty".