1999749764563 has 2 divisors, whose sum is σ = 1999749764564. Its totient is φ = 1999749764562.

The previous prime is 1999749764461. The next prime is 1999749764569. The reversal of 1999749764563 is 3654679479991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1999749764563 is a prime.

It is not a weakly prime, because it can be changed into another prime (1999749764569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999874882281 + 999874882282.

It is an arithmetic number, because the mean of its divisors is an integer number (999874882282).

Almost surely, 2^{1999749764563} is an apocalyptic number.

1999749764563 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999749764563 is an equidigital number, since it uses as much as digits as its factorization.

1999749764563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2777664960, while the sum is 79.

The spelling of 1999749764563 in words is "one trillion, nine hundred ninety-nine billion, seven hundred forty-nine million, seven hundred sixty-four thousand, five hundred sixty-three".