3644662372 has 12 divisors (see below), whose sum is σ = 6868786876. Its totient is φ = 1682151840.

The previous prime is 3644662369. The next prime is 3644662421. The reversal of 3644662372 is 2732664463.

It can be written as a sum of positive squares in 2 ways, for example, as 2449854016 + 1194808356 = 49496^2 + 34566^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

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, 35044779 + ... + 35044882.

Almost surely, 2^3644662372 is an apocalyptic number.

It is an amenable number.

3644662372 is a deficient number, since it is larger than the sum of its proper divisors (3224124504).

3644662372 is a wasteful number, since it uses less digits than its factorization.

3644662372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70089678 (or 70089676 counting only the distinct ones).

The product of its digits is 870912, while the sum is 43.

The square root of 3644662372 is about 60371.0391827075. The cubic root of 3644662372 is about 1538.9308331954.

The spelling of 3644662372 in words is "three billion, six hundred forty-four million, six hundred sixty-two thousand, three hundred seventy-two".