891336497227 has 16 divisors (see below), whose sum is σ = 1033788158208. Its totient is φ = 760451142880.

The previous prime is 891336497197. The next prime is 891336497239. The reversal of 891336497227 is 722794633198.

It is a de Polignac number, because none of the positive numbers 2^k-891336497227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (891336497267) 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, 33223093 + ... + 33249910.

It is an arithmetic number, because the mean of its divisors is an integer number (64611759888).

Almost surely, 2^891336497227 is an apocalyptic number.

891336497227 is a deficient number, since it is larger than the sum of its proper divisors (142451660981).

891336497227 is a wasteful number, since it uses less digits than its factorization.

891336497227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66473090.

The product of its digits is 27433728, while the sum is 61.

The spelling of 891336497227 in words is "eight hundred ninety-one billion, three hundred thirty-six million, four hundred ninety-seven thousand, two hundred twenty-seven".