811842705 has 48 divisors (see below), whose sum is σ = 1431743040. Its totient is φ = 425499264.

The previous prime is 811842679. The next prime is 811842749. The reversal of 811842705 is 507248118.

It is not a de Polignac number, because 811842705 - 2⁵ = 811842673 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 811842705.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 668679 + ... + 669891.

It is an arithmetic number, because the mean of its divisors is an integer number (29827980).

Almost surely, 2^811842705 is an apocalyptic number.

It is an amenable number.

811842705 is a deficient number, since it is larger than the sum of its proper divisors (619900335).

811842705 is a wasteful number, since it uses less digits than its factorization.

811842705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470 (or 1467 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 811842705 is about 28492.8535776956. The cubic root of 811842705 is about 932.8760945591.

The spelling of 811842705 in words is "eight hundred eleven million, eight hundred forty-two thousand, seven hundred five".