76985811 has 18 divisors (see below), whose sum is σ = 129357852. Its totient is φ = 43991640.

The previous prime is 76985791. The next prime is 76985813. The reversal of 76985811 is 11858967.

76985811 is a `hidden beast` number, since 7 + 69 + 8 + 581 + 1 = 666.

It is not a de Polignac number, because 76985811 - 2⁷ = 76985683 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (76985813) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 86845 + ... + 87726.

Almost surely, 2^76985811 is an apocalyptic number.

76985811 is a deficient number, since it is larger than the sum of its proper divisors (52372041).

76985811 is a wasteful number, since it uses less digits than its factorization.

76985811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174591 (or 174581 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 76985811 is about 8774.1558568332. The cubic root of 76985811 is about 425.4059530626.

The spelling of 76985811 in words is "seventy-six million, nine hundred eighty-five thousand, eight hundred eleven".