812182564 has 6 divisors (see below), whose sum is σ = 1421319494. Its totient is φ = 406091280.

The previous prime is 812182541. The next prime is 812182589. The reversal of 812182564 is 465281218.

It can be written as a sum of positive squares in only one way, i.e., 659462400 + 152720164 = 25680^2 + 12358^2 .

It is a super-2 number, since 2×812182564² = 1319281034531228192, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101522817 + ... + 101522824.

Almost surely, 2^812182564 is an apocalyptic number.

It is an amenable number.

812182564 is a deficient number, since it is larger than the sum of its proper divisors (609136930).

812182564 is a wasteful number, since it uses less digits than its factorization.

812182564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203045645 (or 203045643 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 812182564 is about 28498.8168877236. The cubic root of 812182564 is about 933.0062519996.

The spelling of 812182564 in words is "eight hundred twelve million, one hundred eighty-two thousand, five hundred sixty-four".