811649914 has 8 divisors (see below), whose sum is σ = 1224512820. Its totient is φ = 403478976.

The previous prime is 811649911. The next prime is 811649929. The reversal of 811649914 is 419946118.

It can be written as a sum of positive squares in 2 ways, for example, as 579605625 + 232044289 = 24075^2 + 15233^2 .

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

It is not an unprimeable number, because it can be changed into a prime (811649911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172559 + ... + 1173250.

Almost surely, 2^811649914 is an apocalyptic number.

811649914 is a deficient number, since it is larger than the sum of its proper divisors (412862906).

811649914 is a wasteful number, since it uses less digits than its factorization.

811649914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345984.

The product of its digits is 62208, while the sum is 43.

The square root of 811649914 is about 28489.4702302447. The cubic root of 811649914 is about 932.8022443119.

The spelling of 811649914 in words is "eight hundred eleven million, six hundred forty-nine thousand, nine hundred fourteen".