161216064 has 84 divisors (see below), whose sum is σ = 486450640. Its totient is φ = 50906880.

The previous prime is 161216053. The next prime is 161216071. The reversal of 161216064 is 460612161.

161216064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3579 + ... + 18309.

Almost surely, 2^161216064 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 161216064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243225320).

161216064 is an abundant number, since it is smaller than the sum of its proper divisors (325234576).

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

161216064 is a wasteful number, since it uses less digits than its factorization.

161216064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14768 (or 14755 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 161216064 is about 12697.0888001935. The cubic root of 161216064 is about 544.2554307955.

It can be divided in two parts, 161 and 216064, that added together give a square (216225 = 465²).

The spelling of 161216064 in words is "one hundred sixty-one million, two hundred sixteen thousand, sixty-four".