991344319119 has 48 divisors (see below), whose sum is σ = 1803683132160. Its totient is φ = 509674913280.

The previous prime is 991344319099. The next prime is 991344319127. The reversal of 991344319119 is 911913443199.

991344319119 is a `hidden beast` number, since 9 + 9 + 1 + 3 + 443 + 191 + 1 + 9 = 666.

It is not a de Polignac number, because 991344319119 - 2¹⁵ = 991344286351 is a prime.

It is a super-2 number, since 2×991344319119² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991344319129) 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 in 47 ways as a sum of consecutive naturals, for example, 7306549 + ... + 7440990.

It is an arithmetic number, because the mean of its divisors is an integer number (37576731920).

Almost surely, 2^991344319119 is an apocalyptic number.

991344319119 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

991344319119 is a deficient number, since it is larger than the sum of its proper divisors (812338813041).

991344319119 is a wasteful number, since it uses less digits than its factorization.

991344319119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14747660 (or 14747657 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The spelling of 991344319119 in words is "nine hundred ninety-one billion, three hundred forty-four million, three hundred nineteen thousand, one hundred nineteen".