1601320664 has 32 divisors (see below), whose sum is σ = 3029685120. Its totient is φ = 793426176.

The previous prime is 1601320621. The next prime is 1601320681. The reversal of 1601320664 is 4660231061.

It is a happy number.

It is a congruent number.

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, 945002 + ... + 946694.

It is an arithmetic number, because the mean of its divisors is an integer number (94677660).

Almost surely, 2^1601320664 is an apocalyptic number.

It is an amenable number.

1601320664 is a deficient number, since it is larger than the sum of its proper divisors (1428364456).

1601320664 is a wasteful number, since it uses less digits than its factorization.

1601320664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2699 (or 2695 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1601320664 is about 40016.5048948556. The cubic root of 1601320664 is about 1169.9288105320.

The spelling of 1601320664 in words is "one billion, six hundred one million, three hundred twenty thousand, six hundred sixty-four".