3644668516 has 6 divisors (see below), whose sum is σ = 6378169910. Its totient is φ = 1822334256.

The previous prime is 3644668513. The next prime is 3644668523. The reversal of 3644668516 is 6158664463.

It can be written as a sum of positive squares in only one way, i.e., 2237668416 + 1407000100 = 47304^2 + 37510^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3644668516.

It is not an unprimeable number, because it can be changed into a prime (3644668513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 455583561 + ... + 455583568.

Almost surely, 2^3644668516 is an apocalyptic number.

It is an amenable number.

3644668516 is a deficient number, since it is larger than the sum of its proper divisors (2733501394).

3644668516 is a wasteful number, since it uses less digits than its factorization.

3644668516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911167133 (or 911167131 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 49.

The square root of 3644668516 is about 60371.0900680119. The cubic root of 3644668516 is about 1538.9316979473.

The spelling of 3644668516 in words is "three billion, six hundred forty-four million, six hundred sixty-eight thousand, five hundred sixteen".