8399156685885 has 128 divisors (see below), whose sum is σ = 17170387153920. Its totient is φ = 3815919590400.

The previous prime is 8399156685823. The next prime is 8399156685989. The reversal of 8399156685885 is 5885866519938.

8399156685885 is a `hidden beast` number, since 8 + 399 + 15 + 66 + 85 + 8 + 85 = 666.

It is not a de Polignac number, because 8399156685885 - 2¹² = 8399156681789 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 277248799 + ... + 277279091.

It is an arithmetic number, because the mean of its divisors is an integer number (134143649640).

Almost surely, 2^{8399156685885} is an apocalyptic number.

It is an amenable number.

8399156685885 is an abundant number, since it is smaller than the sum of its proper divisors (8771230468035).

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

8399156685885 is a wasteful number, since it uses less digits than its factorization.

8399156685885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32116 (or 32110 counting only the distinct ones).

The product of its digits is 4478976000, while the sum is 81.

The spelling of 8399156685885 in words is "eight trillion, three hundred ninety-nine billion, one hundred fifty-six million, six hundred eighty-five thousand, eight hundred eighty-five".