845205547069 has 16 divisors (see below), whose sum is σ = 981948027312. Its totient is φ = 720441566208.

The previous prime is 845205547057. The next prime is 845205547093. The reversal of 845205547069 is 960745502548.

It can be written as a sum of positive squares in 8 ways, for example, as 26973135225 + 818232411844 = 164235^2 + 904562^2 .

It is not a de Polignac number, because 845205547069 - 2⁹ = 845205546557 is a prime.

It is a super-2 number, since 2×845205547069² (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 (845205545069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36068094 + ... + 36091519.

It is an arithmetic number, because the mean of its divisors is an integer number (61371751707).

Almost surely, 2^845205547069 is an apocalyptic number.

It is an amenable number.

845205547069 is a deficient number, since it is larger than the sum of its proper divisors (136742480243).

845205547069 is a wasteful number, since it uses less digits than its factorization.

845205547069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72159696.

The product of its (nonzero) digits is 12096000, while the sum is 55.

The spelling of 845205547069 in words is "eight hundred forty-five billion, two hundred five million, five hundred forty-seven thousand, sixty-nine".