161600515164 has 144 divisors (see below), whose sum is σ = 461758961664. Its totient is φ = 47209046400.

The previous prime is 161600515117. The next prime is 161600515183. The reversal of 161600515164 is 461515006161.

It is a super-2 number, since 2×161600515164² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3203562 + ... + 3253614.

It is an arithmetic number, because the mean of its divisors is an integer number (3206659456).

Almost surely, 2^161600515164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161600515164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230879480832).

161600515164 is an abundant number, since it is smaller than the sum of its proper divisors (300158446500).

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

161600515164 is a wasteful number, since it uses less digits than its factorization.

161600515164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50368 (or 50363 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 161600515164 in words is "one hundred sixty-one billion, six hundred million, five hundred fifteen thousand, one hundred sixty-four".