891306530109 has 16 divisors (see below), whose sum is σ = 1321359217600. Its totient is φ = 593797058928.

The previous prime is 891306530099. The next prime is 891306530137. The reversal of 891306530109 is 901035603198.

891306530109 is a `hidden beast` number, since 8 + 9 + 1 + 3 + 0 + 6 + 530 + 109 = 666.

It is not a de Polignac number, because 891306530109 - 2⁸ = 891306529853 is a prime.

It is a super-2 number, since 2×891306530109² (a number of 25 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 (891306530189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11273614 + ... + 11352399.

It is an arithmetic number, because the mean of its divisors is an integer number (82584951100).

Almost surely, 2^891306530109 is an apocalyptic number.

It is an amenable number.

891306530109 is a deficient number, since it is larger than the sum of its proper divisors (430052687491).

891306530109 is a wasteful number, since it uses less digits than its factorization.

891306530109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22627481 (or 22627475 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 891306530109 in words is "eight hundred ninety-one billion, three hundred six million, five hundred thirty thousand, one hundred nine".