243161664 has 56 divisors (see below), whose sum is σ = 645798048. Its totient is φ = 80747520.

The previous prime is 243161657. The next prime is 243161683. The reversal of 243161664 is 466161342.

243161664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51699 + ... + 56205.

It is an arithmetic number, because the mean of its divisors is an integer number (11532108).

Almost surely, 2^243161664 is an apocalyptic number.

243161664 is a gapful number since it is divisible by the number (24) 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 243161664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322899024).

243161664 is an abundant number, since it is smaller than the sum of its proper divisors (402636384).

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

243161664 is a wasteful number, since it uses less digits than its factorization.

243161664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4803 (or 4793 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 243161664 is about 15593.6417811876. The cubic root of 243161664 is about 624.1635008769.

The spelling of 243161664 in words is "two hundred forty-three million, one hundred sixty-one thousand, six hundred sixty-four".