1620983970163 has 2 divisors, whose sum is σ = 1620983970164. Its totient is φ = 1620983970162.

The previous prime is 1620983970149. The next prime is 1620983970167. The reversal of 1620983970163 is 3610793890261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1620983970163 - 2⁹ = 1620983969651 is a prime.

It is not a weakly prime, because it can be changed into another prime (1620983970167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810491985081 + 810491985082.

It is an arithmetic number, because the mean of its divisors is an integer number (810491985082).

Almost surely, 2^{1620983970163} is an apocalyptic number.

1620983970163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1620983970163 is an equidigital number, since it uses as much as digits as its factorization.

1620983970163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 1620983970163 in words is "one trillion, six hundred twenty billion, nine hundred eighty-three million, nine hundred seventy thousand, one hundred sixty-three".