161219360 has 96 divisors (see below), whose sum is σ = 396274032. Its totient is φ = 61931520.

The previous prime is 161219327. The next prime is 161219363. The reversal of 161219360 is 63912161.

It can be written as a sum of positive squares in 8 ways, for example, as 74580496 + 86638864 = 8636^2 + 9308^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (161219363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 668840 + ... + 669080.

Almost surely, 2^161219360 is an apocalyptic number.

161219360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161219360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198137016).

161219360 is an abundant number, since it is smaller than the sum of its proper divisors (235054672).

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

161219360 is a wasteful number, since it uses less digits than its factorization.

161219360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 161219360 is about 12697.2185930620. The cubic root of 161219360 is about 544.2591398007.

The spelling of 161219360 in words is "one hundred sixty-one million, two hundred nineteen thousand, three hundred sixty".