630459081 has 48 divisors (see below), whose sum is σ = 1070784000. Its totient is φ = 349985664.

The previous prime is 630459031. The next prime is 630459113. The reversal of 630459081 is 180954036.

630459081 is a `hidden beast` number, since 63 + 0 + 4 + 590 + 8 + 1 = 666.

It is not a de Polignac number, because 630459081 - 2¹⁴ = 630442697 is a prime.

It is a super-2 number, since 2×630459081² = 794957305630729122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (630459031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 440475 + ... + 441903.

It is an arithmetic number, because the mean of its divisors is an integer number (22308000).

Almost surely, 2^630459081 is an apocalyptic number.

It is an amenable number.

630459081 is a deficient number, since it is larger than the sum of its proper divisors (440324919).

630459081 is a wasteful number, since it uses less digits than its factorization.

630459081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638 (or 1635 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 630459081 is about 25108.9442430382. The cubic root of 630459081 is about 857.4700665857.

The spelling of 630459081 in words is "six hundred thirty million, four hundred fifty-nine thousand, eighty-one".