845072091911 has 4 divisors (see below), whose sum is σ = 858925732824. Its totient is φ = 831218451000.

The previous prime is 845072091907. The next prime is 845072091977. The reversal of 845072091911 is 119190270548.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 845072091911 - 2² = 845072091907 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845072081911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6926820365 + ... + 6926820486.

It is an arithmetic number, because the mean of its divisors is an integer number (214731433206).

Almost surely, 2^845072091911 is an apocalyptic number.

845072091911 is a deficient number, since it is larger than the sum of its proper divisors (13853640913).

845072091911 is a wasteful number, since it uses less digits than its factorization.

845072091911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13853640912.

The product of its (nonzero) digits is 181440, while the sum is 47.

The spelling of 845072091911 in words is "eight hundred forty-five billion, seventy-two million, ninety-one thousand, nine hundred eleven".