891996319193 has 16 divisors (see below), whose sum is σ = 1022265688320. Its totient is φ = 762440050176.

The previous prime is 891996319171. The next prime is 891996319213. The reversal of 891996319193 is 391913699198.

It is not a de Polignac number, because 891996319193 - 2¹⁴ = 891996302809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891996319133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3776780 + ... + 4006002.

It is an arithmetic number, because the mean of its divisors is an integer number (63891605520).

Almost surely, 2^891996319193 is an apocalyptic number.

It is an amenable number.

891996319193 is a deficient number, since it is larger than the sum of its proper divisors (130269369127).

891996319193 is a wasteful number, since it uses less digits than its factorization.

891996319193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230776.

The product of its digits is 25509168, while the sum is 68.

The spelling of 891996319193 in words is "eight hundred ninety-one billion, nine hundred ninety-six million, three hundred nineteen thousand, one hundred ninety-three".