999955444559999 has 2 divisors, whose sum is σ = 999955444560000. Its totient is φ = 999955444559998.

The previous prime is 999955444559963. The next prime is 999955444560013.

999955444559999 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 999955444559999 - 2²⁸ = 999955176124543 is a prime.

It is a super-2 number, since 2×999955444559999² (a number of 31 digits) contains 22 as substring.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999955444559399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499977722279999 + 499977722280000.

It is an arithmetic number, because the mean of its divisors is an integer number (499977722280000).

Almost surely, 2^{999955444559999} is an apocalyptic number.

999955444559999 is a deficient number, since it is larger than the sum of its proper divisors (1).

999955444559999 is an equidigital number, since it uses as much as digits as its factorization.

999955444559999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1721868840000, while the sum is 104.

The spelling of 999955444559999 in words is "nine hundred ninety-nine trillion, nine hundred fifty-five billion, four hundred forty-four million, five hundred fifty-nine thousand, nine hundred ninety-nine".