630644345 has 4 divisors (see below), whose sum is σ = 756773220. Its totient is φ = 504515472.

The previous prime is 630644327. The next prime is 630644369. The reversal of 630644345 is 543446036.

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

It can be written as a sum of positive squares in 2 ways, for example, as 284833129 + 345811216 = 16877^2 + 18596^2 .

It is a cyclic number.

It is not a de Polignac number, because 630644345 - 2⁸ = 630644089 is a prime.

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, 63064430 + ... + 63064439.

It is an arithmetic number, because the mean of its divisors is an integer number (189193305).

Almost surely, 2^630644345 is an apocalyptic number.

It is an amenable number.

630644345 is a deficient number, since it is larger than the sum of its proper divisors (126128875).

630644345 is a wasteful number, since it uses less digits than its factorization.

630644345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126128874.

The product of its (nonzero) digits is 103680, while the sum is 35.

The square root of 630644345 is about 25112.6331753562. The cubic root of 630644345 is about 857.5540491846.

The spelling of 630644345 in words is "six hundred thirty million, six hundred forty-four thousand, three hundred forty-five".