161589064 has 96 divisors (see below), whose sum is σ = 390269880. Its totient is φ = 62125056.

The previous prime is 161589047. The next prime is 161589079. The reversal of 161589064 is 460985161.

It can be written as a sum of positive squares in 4 ways, for example, as 159820164 + 1768900 = 12642^2 + 1330^2 .

It is a super-2 number, since 2×161589064² = 52222051208792192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188124 + ... + 188980.

Almost surely, 2^161589064 is an apocalyptic number.

161589064 is a gapful number since it is divisible by the number (14) 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 161589064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195134940).

161589064 is an abundant number, since it is smaller than the sum of its proper divisors (228680816).

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

161589064 is a wasteful number, since it uses less digits than its factorization.

161589064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 161589064 is about 12711.7687203630. The cubic root of 161589064 is about 544.6748491172.

The spelling of 161589064 in words is "one hundred sixty-one million, five hundred eighty-nine thousand, sixty-four".