991534435199 has 8 divisors (see below), whose sum is σ = 1236198776448. Its totient is φ = 772624235160.

The previous prime is 991534435183. The next prime is 991534435217.

991534435199 is nontrivially palindromic in base 10.

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 991534435199 - 2⁴ = 991534435183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991534435169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6438535217 + ... + 6438535370.

It is an arithmetic number, because the mean of its divisors is an integer number (154524847056).

Almost surely, 2^991534435199 is an apocalyptic number.

991534435199 is a deficient number, since it is larger than the sum of its proper divisors (244664341249).

991534435199 is a wasteful number, since it uses less digits than its factorization.

991534435199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12877070605.

The product of its digits is 23619600, while the sum is 62.

The spelling of 991534435199 in words is "nine hundred ninety-one billion, five hundred thirty-four million, four hundred thirty-five thousand, one hundred ninety-nine".