630170645 has 8 divisors (see below), whose sum is σ = 814374456. Its totient is φ = 465356736.

The previous prime is 630170627. The next prime is 630170657. The reversal of 630170645 is 546071036.

It can be written as a sum of positive squares in 4 ways, for example, as 1214404 + 628956241 = 1102^2 + 25079^2 .

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

It is not a de Polignac number, because 630170645 - 2⁶ = 630170581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4847402 + ... + 4847531.

It is an arithmetic number, because the mean of its divisors is an integer number (101796807).

Almost surely, 2^630170645 is an apocalyptic number.

630170645 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

630170645 is a deficient number, since it is larger than the sum of its proper divisors (184203811).

630170645 is a wasteful number, since it uses less digits than its factorization.

630170645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9694951.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 630170645 is about 25103.1998956308. The cubic root of 630170645 is about 857.3392820138.

The spelling of 630170645 in words is "six hundred thirty million, one hundred seventy thousand, six hundred forty-five".