1630720664323 has 2 divisors, whose sum is σ = 1630720664324. Its totient is φ = 1630720664322.

The previous prime is 1630720664317. The next prime is 1630720664411. The reversal of 1630720664323 is 3234660270361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1630720664323 - 2¹⁷ = 1630720533251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1630720664323.

It is not a weakly prime, because it can be changed into another prime (1630720664123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815360332161 + 815360332162.

It is an arithmetic number, because the mean of its divisors is an integer number (815360332162).

Almost surely, 2^{1630720664323} is an apocalyptic number.

1630720664323 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630720664323 is an equidigital number, since it uses as much as digits as its factorization.

1630720664323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 653184, while the sum is 43.

The spelling of 1630720664323 in words is "one trillion, six hundred thirty billion, seven hundred twenty million, six hundred sixty-four thousand, three hundred twenty-three".