811712196 has 18 divisors (see below), whose sum is σ = 2051828142. Its totient is φ = 270570720.

The previous prime is 811712191. The next prime is 811712249. The reversal of 811712196 is 691217118.

It can be written as a sum of positive squares in only one way, i.e., 810199296 + 1512900 = 28464^2 + 1230^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 22547561 = 811712196 / (8 + 1 + 1 + 7 + 1 + 2 + 1 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 811712196.

It is not an unprimeable number, because it can be changed into a prime (811712191) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11273745 + ... + 11273816.

Almost surely, 2^811712196 is an apocalyptic number.

It is an amenable number.

811712196 is an abundant number, since it is smaller than the sum of its proper divisors (1240115946).

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

811712196 is a wasteful number, since it uses less digits than its factorization.

811712196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22547571 (or 22547566 counting only the distinct ones).

The product of its digits is 6048, while the sum is 36.

The square root of 811712196 is about 28490.5632797949. The cubic root of 811712196 is about 932.8261032451.

The spelling of 811712196 in words is "eight hundred eleven million, seven hundred twelve thousand, one hundred ninety-six".