1630840811 has 2 divisors, whose sum is σ = 1630840812. Its totient is φ = 1630840810.

The previous prime is 1630840807. The next prime is 1630840817. The reversal of 1630840811 is 1180480361.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1630840811 - 2² = 1630840807 is a prime.

It is not a weakly prime, because it can be changed into another prime (1630840817) by changing a digit.

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 as a sum of consecutive naturals, namely, 815420405 + 815420406.

It is an arithmetic number, because the mean of its divisors is an integer number (815420406).

Almost surely, 2^1630840811 is an apocalyptic number.

1630840811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630840811 is an equidigital number, since it uses as much as digits as its factorization.

1630840811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 1630840811 is about 40383.6701031494. The cubic root of 1630840811 is about 1177.0742443458.

The spelling of 1630840811 in words is "one billion, six hundred thirty million, eight hundred forty thousand, eight hundred eleven".