161258368 has 32 divisors (see below), whose sum is σ = 322695360. Its totient is φ = 80268288.

The previous prime is 161258353. The next prime is 161258389. The reversal of 161258368 is 863852161.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×161258368² = 52008522500046848, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161258368.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27121 + ... + 32527.

It is an arithmetic number, because the mean of its divisors is an integer number (10084230).

Almost surely, 2^161258368 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 161258368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161347680).

161258368 is an abundant number, since it is smaller than the sum of its proper divisors (161436992).

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

161258368 is an equidigital number, since it uses as much as digits as its factorization.

161258368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5654 (or 5642 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 161258368 is about 12698.7545846040. The cubic root of 161258368 is about 544.3030318587.

The spelling of 161258368 in words is "one hundred sixty-one million, two hundred fifty-eight thousand, three hundred sixty-eight".