20161165170 has 16 divisors (see below), whose sum is σ = 48386796480. Its totient is φ = 5376310704.

The previous prime is 20161165169. The next prime is 20161165187. The reversal of 20161165170 is 7156116102.

It is a super-2 number, since 2×20161165170² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 672038839 = 20161165170 / (2 + 0 + 1 + 6 + 1 + 1 + 6 + 5 + 1 + 7 + 0).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336019390 + ... + 336019449.

It is an arithmetic number, because the mean of its divisors is an integer number (3024174780).

Almost surely, 2^20161165170 is an apocalyptic number.

20161165170 is an abundant number, since it is smaller than the sum of its proper divisors (28225631310).

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

20161165170 is a wasteful number, since it uses less digits than its factorization.

20161165170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672038849.

The product of its (nonzero) digits is 2520, while the sum is 30.

The spelling of 20161165170 in words is "twenty billion, one hundred sixty-one million, one hundred sixty-five thousand, one hundred seventy".