999991042044031 has 8 divisors (see below), whose sum is σ = 1036510244916480. Its totient is φ = 964106955743448.

The previous prime is 999991042044013. The next prime is 999991042044103. The reversal of 999991042044031 is 130440240199999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 999991042044031 - 2¹⁷ = 999991041912959 is a prime.

It is a super-2 number, since 2×999991042044031² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999991042044011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158779139761 + ... + 158779146058.

It is an arithmetic number, because the mean of its divisors is an integer number (129563780614560).

Almost surely, 2^{999991042044031} is an apocalyptic number.

999991042044031 is a deficient number, since it is larger than the sum of its proper divisors (36519202872449).

999991042044031 is a wasteful number, since it uses less digits than its factorization.

999991042044031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317558285933.

The product of its (nonzero) digits is 22674816, while the sum is 64.

The spelling of 999991042044031 in words is "nine hundred ninety-nine trillion, nine hundred ninety-one billion, forty-two million, forty-four thousand, thirty-one".