991402204199 has 8 divisors (see below), whose sum is σ = 1081580456448. Its totient is φ = 901232415160.

The previous prime is 991402204183. The next prime is 991402204213.

991402204199 is nontrivially palindromic in base 10.

991402204199 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 991402204199 - 2⁴ = 991402204183 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 (991402204139) 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, 1869617 + ... + 2340570.

It is an arithmetic number, because the mean of its divisors is an integer number (135197557056).

Almost surely, 2^991402204199 is an apocalyptic number.

991402204199 is a deficient number, since it is larger than the sum of its proper divisors (90178252249).

991402204199 is a wasteful number, since it uses less digits than its factorization.

991402204199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231605.

The product of its (nonzero) digits is 419904, while the sum is 50.

The spelling of 991402204199 in words is "nine hundred ninety-one billion, four hundred two million, two hundred four thousand, one hundred ninety-nine".