1999724590399 has 2 divisors, whose sum is σ = 1999724590400. Its totient is φ = 1999724590398.

The previous prime is 1999724590337. The next prime is 1999724590433. The reversal of 1999724590399 is 9930954279991.

It is a strong prime.

It is an emirp because it is prime and its reverse (9930954279991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1999724590399 - 2²⁵ = 1999691035967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1999724596399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999862295199 + 999862295200.

It is an arithmetic number, because the mean of its divisors is an integer number (999862295200).

Almost surely, 2^{1999724590399} is an apocalyptic number.

1999724590399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999724590399 is an equidigital number, since it uses as much as digits as its factorization.

1999724590399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 446410440, while the sum is 76.

The spelling of 1999724590399 in words is "one trillion, nine hundred ninety-nine billion, seven hundred twenty-four million, five hundred ninety thousand, three hundred ninety-nine".