891285391316 has 6 divisors (see below), whose sum is σ = 1559749434810. Its totient is φ = 445642695656.

The previous prime is 891285391313. The next prime is 891285391331. The reversal of 891285391316 is 613193582198.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 766920547600 + 124364843716 = 875740^2 + 352654^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891285391313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111410673911 + ... + 111410673918.

It is an arithmetic number, because the mean of its divisors is an integer number (259958239135).

Almost surely, 2^891285391316 is an apocalyptic number.

It is an amenable number.

891285391316 is a deficient number, since it is larger than the sum of its proper divisors (668464043494).

891285391316 is a wasteful number, since it uses less digits than its factorization.

891285391316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222821347833 (or 222821347831 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 56.

The spelling of 891285391316 in words is "eight hundred ninety-one billion, two hundred eighty-five million, three hundred ninety-one thousand, three hundred sixteen".