845581045 has 4 divisors (see below), whose sum is σ = 1014697260. Its totient is φ = 676464832.

The previous prime is 845581021. The next prime is 845581069. The reversal of 845581045 is 540185548.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (845581021) and next prime (845581069).

It can be written as a sum of positive squares in 2 ways, for example, as 543029809 + 302551236 = 23303^2 + 17394^2 .

It is a cyclic number.

It is not a de Polignac number, because 845581045 - 2⁷ = 845580917 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 845580989 and 845581007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84558100 + ... + 84558109.

It is an arithmetic number, because the mean of its divisors is an integer number (253674315).

Almost surely, 2^845581045 is an apocalyptic number.

It is an amenable number.

845581045 is a deficient number, since it is larger than the sum of its proper divisors (169116215).

845581045 is a wasteful number, since it uses less digits than its factorization.

845581045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169116214.

The product of its (nonzero) digits is 128000, while the sum is 40.

The square root of 845581045 is about 29078.8762678340. The cubic root of 845581045 is about 945.6238408552.

The spelling of 845581045 in words is "eight hundred forty-five million, five hundred eighty-one thousand, forty-five".