811164742 has 16 divisors (see below), whose sum is σ = 1259938800. Its totient is φ = 391212640.

The previous prime is 811164733. The next prime is 811164743. The reversal of 811164742 is 247461118.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 811164698 and 811164707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811164743) 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, 58017 + ... + 70627.

It is an arithmetic number, because the mean of its divisors is an integer number (78746175).

Almost surely, 2^811164742 is an apocalyptic number.

811164742 is a deficient number, since it is larger than the sum of its proper divisors (448774058).

811164742 is a wasteful number, since it uses less digits than its factorization.

811164742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13751.

The product of its digits is 10752, while the sum is 34.

The square root of 811164742 is about 28480.9540219425. The cubic root of 811164742 is about 932.6163432525.

It can be divided in two parts, 81116 and 4742, that added together give a palindrome (85858).

The spelling of 811164742 in words is "eight hundred eleven million, one hundred sixty-four thousand, seven hundred forty-two".