891322580008 has 16 divisors (see below), whose sum is σ = 1909976957280. Its totient is φ = 381995391408.

The previous prime is 891322579871. The next prime is 891322580009. The reversal of 891322580008 is 800085223198.

It is a super-2 number, since 2×891322580008² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 891322580008.

It is not an unprimeable number, because it can be changed into a prime (891322580009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7958237266 + ... + 7958237377.

It is an arithmetic number, because the mean of its divisors is an integer number (119373559830).

Almost surely, 2^891322580008 is an apocalyptic number.

It is an amenable number.

891322580008 is an abundant number, since it is smaller than the sum of its proper divisors (1018654377272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

891322580008 is a wasteful number, since it uses less digits than its factorization.

891322580008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15916474656 (or 15916474652 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 46.

The spelling of 891322580008 in words is "eight hundred ninety-one billion, three hundred twenty-two million, five hundred eighty thousand, eight".