1630646138 has 8 divisors (see below), whose sum is σ = 2668330080. Its totient is φ = 741202780.

The previous prime is 1630646123. The next prime is 1630646141. The reversal of 1630646138 is 8316460361.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 37060118 + ... + 37060161.

It is an arithmetic number, because the mean of its divisors is an integer number (333541260).

Almost surely, 2^1630646138 is an apocalyptic number.

1630646138 is a deficient number, since it is larger than the sum of its proper divisors (1037683942).

1630646138 is a wasteful number, since it uses less digits than its factorization.

1630646138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74120292.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 1630646138 is about 40381.2597376555. The cubic root of 1630646138 is about 1177.0274068104.

The spelling of 1630646138 in words is "one billion, six hundred thirty million, six hundred forty-six thousand, one hundred thirty-eight".