999955444559399 has 2 divisors, whose sum is σ = 999955444559400. Its totient is φ = 999955444559398.

The previous prime is 999955444559387. The next prime is 999955444559441. The reversal of 999955444559399 is 993955444559999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999955444559399 is a prime.

It is a super-2 number, since 2×999955444559399² (a number of 31 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999955444559359) 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, 499977722279699 + 499977722279700.

It is an arithmetic number, because the mean of its divisors is an integer number (499977722279700).

Almost surely, 2^{999955444559399} is an apocalyptic number.

999955444559399 is a deficient number, since it is larger than the sum of its proper divisors (1).

999955444559399 is an equidigital number, since it uses as much as digits as its factorization.

999955444559399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 573956280000, while the sum is 98.

The spelling of 999955444559399 in words is "nine hundred ninety-nine trillion, nine hundred fifty-five billion, four hundred forty-four million, five hundred fifty-nine thousand, three hundred ninety-nine".