811749168 has 40 divisors (see below), whose sum is σ = 2330022000. Its totient is φ = 270582912.

The previous prime is 811749161. The next prime is 811749181. The reversal of 811749168 is 861947118.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (811749161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939093 + ... + 939956.

It is an arithmetic number, because the mean of its divisors is an integer number (58250550).

Almost surely, 2^811749168 is an apocalyptic number.

It is an amenable number.

811749168 is an abundant number, since it is smaller than the sum of its proper divisors (1518272832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811749168 is a wasteful number, since it uses less digits than its factorization.

811749168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879066 (or 1879054 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 811749168 is about 28491.2121188271. The cubic root of 811749168 is about 932.8402658688.

The spelling of 811749168 in words is "eight hundred eleven million, seven hundred forty-nine thousand, one hundred sixty-eight".