161613664 has 24 divisors (see below), whose sum is σ = 328442688. Its totient is φ = 78199680.

The previous prime is 161613649. The next prime is 161613689. The reversal of 161613664 is 466316161.

161613664 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161613664² = 52237952783009792, which contains 22 as substring.

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, 80467 + ... + 82450.

It is an arithmetic number, because the mean of its divisors is an integer number (13685112).

Almost surely, 2^161613664 is an apocalyptic number.

It is an amenable number.

161613664 is an abundant number, since it is smaller than the sum of its proper divisors (166829024).

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

161613664 is a wasteful number, since it uses less digits than its factorization.

161613664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162958 (or 162950 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 161613664 is about 12712.7362908227. The cubic root of 161613664 is about 544.7024877892.

The spelling of 161613664 in words is "one hundred sixty-one million, six hundred thirteen thousand, six hundred sixty-four".