1601645264 has 20 divisors (see below), whose sum is σ = 3146896800. Its totient is φ = 789542880.

The previous prime is 1601645257. The next prime is 1601645291. The reversal of 1601645264 is 4625461061.

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, 703814 + ... + 706085.

It is an arithmetic number, because the mean of its divisors is an integer number (157344840).

Almost surely, 2^1601645264 is an apocalyptic number.

It is an amenable number.

1601645264 is a deficient number, since it is larger than the sum of its proper divisors (1545251536).

1601645264 is a wasteful number, since it uses less digits than its factorization.

1601645264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409978 (or 1409972 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1601645264 is about 40020.5605158149. The cubic root of 1601645264 is about 1170.0078563770.

The spelling of 1601645264 in words is "one billion, six hundred one million, six hundred forty-five thousand, two hundred sixty-four".