845668687267 has 4 divisors (see below), whose sum is σ = 845674945456. Its totient is φ = 845662429080.

The previous prime is 845668687243. The next prime is 845668687277. The reversal of 845668687267 is 762786866548.

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 845668687267 - 2¹⁹ = 845668162979 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 845668687267.

It is not an unprimeable number, because it can be changed into a prime (845668687277) 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 3 ways as a sum of consecutive naturals, for example, 2921823 + ... + 3198184.

It is an arithmetic number, because the mean of its divisors is an integer number (211418736364).

Almost surely, 2^845668687267 is an apocalyptic number.

845668687267 is a deficient number, since it is larger than the sum of its proper divisors (6258189).

845668687267 is a wasteful number, since it uses less digits than its factorization.

845668687267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6258188.

The product of its digits is 1300561920, while the sum is 73.

The spelling of 845668687267 in words is "eight hundred forty-five billion, six hundred sixty-eight million, six hundred eighty-seven thousand, two hundred sixty-seven".