3643493664 has 48 divisors (see below), whose sum is σ = 9980010432. Its totient is φ = 1161692928.

The previous prime is 3643493657. The next prime is 3643493683. The reversal of 3643493664 is 4663943463.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 822859 + ... + 827274.

It is an arithmetic number, because the mean of its divisors is an integer number (207916884).

Almost surely, 2^3643493664 is an apocalyptic number.

It is an amenable number.

3643493664 is an abundant number, since it is smaller than the sum of its proper divisors (6336516768).

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

3643493664 is a wasteful number, since it uses less digits than its factorization.

3643493664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650169 (or 1650161 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 48.

The square root of 3643493664 is about 60361.3590304261. The cubic root of 3643493664 is about 1538.7663229362.

The spelling of 3643493664 in words is "three billion, six hundred forty-three million, four hundred ninety-three thousand, six hundred sixty-four".