810777081 has 8 divisors (see below), whose sum is σ = 1081198080. Its totient is φ = 540437072.

The previous prime is 810777067. The next prime is 810777137. The reversal of 810777081 is 180777018.

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

It is a cyclic number.

It is not a de Polignac number, because 810777081 - 2¹⁷ = 810646009 is a prime.

It is a super-2 number, since 2×810777081² = 1314718950149761122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (810777181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9256 + ... + 41318.

It is an arithmetic number, because the mean of its divisors is an integer number (135149760).

Almost surely, 2^810777081 is an apocalyptic number.

It is an amenable number.

810777081 is a deficient number, since it is larger than the sum of its proper divisors (270420999).

810777081 is a wasteful number, since it uses less digits than its factorization.

810777081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40495.

The product of its (nonzero) digits is 21952, while the sum is 39.

The square root of 810777081 is about 28474.1475904021. The cubic root of 810777081 is about 932.4677517377.

The spelling of 810777081 in words is "eight hundred ten million, seven hundred seventy-seven thousand, eighty-one".