891151859344319 has 4 divisors (see below), whose sum is σ = 891967185840696. Its totient is φ = 890336532847944.

The previous prime is 891151859344297. The next prime is 891151859344421. The reversal of 891151859344319 is 913443958151198.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-891151859344319 is a prime.

It is a super-2 number, since 2×891151859344319² (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 (891151859314319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407663246549 + ... + 407663248734.

It is an arithmetic number, because the mean of its divisors is an integer number (222991796460174).

Almost surely, 2^{891151859344319} is an apocalyptic number.

891151859344319 is a deficient number, since it is larger than the sum of its proper divisors (815326496377).

891151859344319 is a wasteful number, since it uses less digits than its factorization.

891151859344319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815326496376.

The product of its digits is 167961600, while the sum is 71.

The spelling of 891151859344319 in words is "eight hundred ninety-one trillion, one hundred fifty-one billion, eight hundred fifty-nine million, three hundred forty-four thousand, three hundred nineteen".