809081045 has 8 divisors (see below), whose sum is σ = 975138360. Its totient is φ = 644437440.

The previous prime is 809081029. The next prime is 809081081. The reversal of 809081045 is 540180908.

It can be written as a sum of positive squares in 4 ways, for example, as 274962724 + 534118321 = 16582^2 + 23111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 809081045 - 2⁴ = 809081029 is a prime.

It is a super-2 number, since 2×809081045² = 1309224274756584050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 809080996 and 809081014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352166 + ... + 354455.

It is an arithmetic number, because the mean of its divisors is an integer number (121892295).

Almost surely, 2^809081045 is an apocalyptic number.

It is an amenable number.

809081045 is a deficient number, since it is larger than the sum of its proper divisors (166057315).

809081045 is a wasteful number, since it uses less digits than its factorization.

809081045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706855.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 809081045 is about 28444.3499662059. The cubic root of 809081045 is about 931.8170990257.

The spelling of 809081045 in words is "eight hundred nine million, eighty-one thousand, forty-five".