4644649538 has 8 divisors (see below), whose sum is σ = 6967760700. Its totient is φ = 2322062640.

The previous prime is 4644649517. The next prime is 4644649547. The reversal of 4644649538 is 8359464464.

It can be written as a sum of positive squares in 2 ways, for example, as 4638563449 + 6086089 = 68107^2 + 2467^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×4644649538² = 43145538661687226888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4644649538.

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, 108113 + ... + 144836.

Almost surely, 2^4644649538 is an apocalyptic number.

4644649538 is a deficient number, since it is larger than the sum of its proper divisors (2323111162).

4644649538 is a wasteful number, since it uses less digits than its factorization.

4644649538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262132.

The product of its digits is 9953280, while the sum is 53.

The square root of 4644649538 is about 68151.6657023143. The cubic root of 4644649538 is about 1668.4671100130.

The spelling of 4644649538 in words is "four billion, six hundred forty-four million, six hundred forty-nine thousand, five hundred thirty-eight".