80854645 has 4 divisors (see below), whose sum is σ = 97025580. Its totient is φ = 64683712.

The previous prime is 80854619. The next prime is 80854649. The reversal of 80854645 is 54645808.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9991921 + 70862724 = 3161^2 + 8418^2 .

It is a cyclic number.

It is not a de Polignac number, because 80854645 - 2⁹ = 80854133 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 = 80854598 and 80854607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80854649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8085460 + ... + 8085469.

It is an arithmetic number, because the mean of its divisors is an integer number (24256395).

Almost surely, 2^80854645 is an apocalyptic number.

It is an amenable number.

80854645 is a deficient number, since it is larger than the sum of its proper divisors (16170935).

80854645 is a wasteful number, since it uses less digits than its factorization.

80854645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16170934.

The product of its (nonzero) digits is 153600, while the sum is 40.

The square root of 80854645 is about 8991.9210961841. The cubic root of 80854645 is about 432.4159035484.

The spelling of 80854645 in words is "eighty million, eight hundred fifty-four thousand, six hundred forty-five".