811722632 has 36 divisors (see below), whose sum is σ = 1771697655. Its totient is φ = 347639376.

The previous prime is 811722629. The next prime is 811722641. The reversal of 811722632 is 236227118.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 405861316 + 405861316 = 20146^2 + 20146^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=20146.

It is a zygodrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 563369 + ... + 564807.

Almost surely, 2^811722632 is an apocalyptic number.

It is an amenable number.

811722632 is an abundant number, since it is smaller than the sum of its proper divisors (959975023).

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

811722632 is an equidigital number, since it uses as much as digits as its factorization.

811722632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898 (or 1448 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 811722632 is about 28490.7464275684. The cubic root of 811722632 is about 932.8301009394.

Multiplying 811722632 by its sum of digits (32), we get a square (25975124224 = 161168²).

The spelling of 811722632 in words is "eight hundred eleven million, seven hundred twenty-two thousand, six hundred thirty-two".