165615397100 has 18 divisors (see below), whose sum is σ = 359385411924. Its totient is φ = 66246158800.

The previous prime is 165615397099. The next prime is 165615397139. The reversal of 165615397100 is 1793516561.

165615397100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 828076886 + ... + 828077085.

It is an arithmetic number, because the mean of its divisors is an integer number (19965856218).

Almost surely, 2^165615397100 is an apocalyptic number.

165615397100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165615397100 is an abundant number, since it is smaller than the sum of its proper divisors (193770014824).

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

165615397100 is a wasteful number, since it uses less digits than its factorization.

165615397100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656153985 (or 1656153978 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 44.

The spelling of 165615397100 in words is "one hundred sixty-five billion, six hundred fifteen million, three hundred ninety-seven thousand, one hundred".