630154985 has 8 divisors (see below), whose sum is σ = 757307016. Its totient is φ = 503376640.

The previous prime is 630154937. The next prime is 630155023. The reversal of 630154985 is 589451036.

It can be written as a sum of positive squares in 4 ways, for example, as 458859241 + 171295744 = 21421^2 + 13088^2 .

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

It is not a de Polignac number, because 630154985 - 2²⁸ = 361719529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 89696 + ... + 96465.

It is an arithmetic number, because the mean of its divisors is an integer number (94663377).

Almost surely, 2^630154985 is an apocalyptic number.

It is an amenable number.

630154985 is a deficient number, since it is larger than the sum of its proper divisors (127152031).

630154985 is a wasteful number, since it uses less digits than its factorization.

630154985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186843.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 630154985 is about 25102.8879812662. The cubic root of 630154985 is about 857.3321802102.

The spelling of 630154985 in words is "six hundred thirty million, one hundred fifty-four thousand, nine hundred eighty-five".