891151859344321 has 8 divisors (see below), whose sum is σ = 921905522458920. Its totient is φ = 860399815473408.

The previous prime is 891151859344297. The next prime is 891151859344421. The reversal of 891151859344321 is 123443958151198.

891151859344321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2935434582721 + 888216424761600 = 1713311^2 + 29802960^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-891151859344321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891151859344421) 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, 403691176 + ... + 405892681.

It is an arithmetic number, because the mean of its divisors is an integer number (115238190307365).

Almost surely, 2^{891151859344321} is an apocalyptic number.

It is an amenable number.

891151859344321 is a deficient number, since it is larger than the sum of its proper divisors (30753663114599).

891151859344321 is a wasteful number, since it uses less digits than its factorization.

891151859344321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809621843.

The product of its digits is 37324800, while the sum is 64.

The spelling of 891151859344321 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 twenty-one".