1630643005 has 12 divisors (see below), whose sum is σ = 1962190620. Its totient is φ = 1300910912.

The previous prime is 1630642999. The next prime is 1630643017. The reversal of 1630643005 is 5003460361.

It can be written as a sum of positive squares in 2 ways, for example, as 972566596 + 658076409 = 31186^2 + 25653^2 .

It is not a de Polignac number, because 1630643005 - 2⁵ = 1630642973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1264401 + ... + 1265689.

It is an arithmetic number, because the mean of its divisors is an integer number (163515885).

Almost surely, 2^1630643005 is an apocalyptic number.

It is an amenable number.

1630643005 is a deficient number, since it is larger than the sum of its proper divisors (331547615).

1630643005 is an frugal number, since it uses more digits than its factorization.

1630643005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2300 (or 1797 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 1630643005 is about 40381.2209448897. The cubic root of 1630643005 is about 1177.0266529928.

The spelling of 1630643005 in words is "one billion, six hundred thirty million, six hundred forty-three thousand, five".