1630640801 has 8 divisors (see below), whose sum is σ = 1677587520. Its totient is φ = 1583845488.

The previous prime is 1630640789. The next prime is 1630640839. The reversal of 1630640801 is 1080460361.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630640801 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1630640861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15821 + ... + 59258.

It is an arithmetic number, because the mean of its divisors is an integer number (209698440).

Almost surely, 2^1630640801 is an apocalyptic number.

It is an amenable number.

1630640801 is a deficient number, since it is larger than the sum of its proper divisors (46946719).

1630640801 is an equidigital number, since it uses as much as digits as its factorization.

1630640801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75703.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1630640801 is about 40381.1936549677. The cubic root of 1630640801 is about 1177.0261226973.

The spelling of 1630640801 in words is "one billion, six hundred thirty million, six hundred forty thousand, eight hundred one".