161929160 has 16 divisors (see below), whose sum is σ = 364340700. Its totient is φ = 64771648.

The previous prime is 161929139. The next prime is 161929169. The reversal of 161929160 is 61929161.

It can be written as a sum of positive squares in 2 ways, for example, as 158810404 + 3118756 = 12602^2 + 1766^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 161929160.

It is not an unprimeable number, because it can be changed into a prime (161929169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2024075 + ... + 2024154.

Almost surely, 2^161929160 is an apocalyptic number.

161929160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161929160 is an abundant number, since it is smaller than the sum of its proper divisors (202411540).

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

161929160 is a wasteful number, since it uses less digits than its factorization.

161929160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048240 (or 4048236 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 161929160 is about 12725.1388990455. The cubic root of 161929160 is about 545.0567064975.

Subtracting from 161929160 its reverse (61929161), we obtain a palindrome (99999999).

It can be divided in two parts, 16192 and 9160, that added together give a palindrome (25352).

The spelling of 161929160 in words is "one hundred sixty-one million, nine hundred twenty-nine thousand, one hundred sixty".