3699643644 has 36 divisors (see below), whose sum is σ = 9375234960. Its totient is φ = 1230134400.

The previous prime is 3699643643. The next prime is 3699643657. The reversal of 3699643644 is 4463469963.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3699643643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113704 + ... + 142575.

Almost surely, 2^3699643644 is an apocalyptic number.

It is an amenable number.

3699643644 is an abundant number, since it is smaller than the sum of its proper divisors (5675591316).

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

3699643644 is a wasteful number, since it uses less digits than its factorization.

3699643644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256690 (or 256685 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 54.

The square root of 3699643644 is about 60824.6960041725. The cubic root of 3699643644 is about 1546.6307173282.

The spelling of 3699643644 in words is "three billion, six hundred ninety-nine million, six hundred forty-three thousand, six hundred forty-four".