3647664646 has 4 divisors (see below), whose sum is σ = 5471496972. Its totient is φ = 1823832322.

The previous prime is 3647664637. The next prime is 3647664659. The reversal of 3647664646 is 6464667463.

3647664646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 3647664593 and 3647664602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 911916160 + ... + 911916163.

It is an arithmetic number, because the mean of its divisors is an integer number (1367874243).

Almost surely, 2^3647664646 is an apocalyptic number.

3647664646 is a deficient number, since it is larger than the sum of its proper divisors (1823832326).

3647664646 is a wasteful number, since it uses less digits than its factorization.

3647664646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823832325.

The product of its digits is 10450944, while the sum is 52.

The square root of 3647664646 is about 60395.8992482106. The cubic root of 3647664646 is about 1539.3532796380.

The spelling of 3647664646 in words is "three billion, six hundred forty-seven million, six hundred sixty-four thousand, six hundred forty-six".