812678481 has 32 divisors (see below), whose sum is σ = 1271531520. Its totient is φ = 511953552.

The previous prime is 812678479. The next prime is 812678483. The reversal of 812678481 is 184876218.

812678481 is a `hidden beast` number, since 81 + 26 + 78 + 481 = 666.

It is an interprime number because it is at equal distance from previous prime (812678479) and next prime (812678483).

It is not a de Polignac number, because 812678481 - 2¹ = 812678479 is a prime.

It is a super-2 number, since 2×812678481² = 1320892626960934722, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (812678483) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43660 + ... + 59426.

It is an arithmetic number, because the mean of its divisors is an integer number (39735360).

Almost surely, 2^812678481 is an apocalyptic number.

It is an amenable number.

812678481 is a deficient number, since it is larger than the sum of its proper divisors (458853039).

812678481 is a wasteful number, since it uses less digits than its factorization.

812678481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15882 (or 15876 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 812678481 is about 28507.5162194113. The cubic root of 812678481 is about 933.1961105940.

The spelling of 812678481 in words is "eight hundred twelve million, six hundred seventy-eight thousand, four hundred eighty-one".