1621808229883 has 2 divisors, whose sum is σ = 1621808229884. Its totient is φ = 1621808229882.

The previous prime is 1621808229871. The next prime is 1621808229947. The reversal of 1621808229883 is 3889228081261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1621808229883 - 2¹⁷ = 1621808098811 is a prime.

It is not a weakly prime, because it can be changed into another prime (1621808229863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 810904114941 + 810904114942.

It is an arithmetic number, because the mean of its divisors is an integer number (810904114942).

Almost surely, 2^{1621808229883} is an apocalyptic number.

1621808229883 is a deficient number, since it is larger than the sum of its proper divisors (1).

1621808229883 is an equidigital number, since it uses as much as digits as its factorization.

1621808229883 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5308416, while the sum is 58.

The spelling of 1621808229883 in words is "one trillion, six hundred twenty-one billion, eight hundred eight million, two hundred twenty-nine thousand, eight hundred eighty-three".