811632601 has 4 divisors (see below), whose sum is σ = 874065892. Its totient is φ = 749199312.

The previous prime is 811632589. The next prime is 811632617. The reversal of 811632601 is 106236118.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106236118 = 2 ⋅53118059.

It can be written as a sum of positive squares in 2 ways, for example, as 36288576 + 775344025 = 6024^2 + 27845^2 .

It is a cyclic number.

It is not a de Polignac number, because 811632601 - 2¹³ = 811624409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 811632601.

It is not an unprimeable number, because it can be changed into a prime (811632631) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 31216626 + ... + 31216651.

It is an arithmetic number, because the mean of its divisors is an integer number (218516473).

Almost surely, 2^811632601 is an apocalyptic number.

It is an amenable number.

811632601 is a deficient number, since it is larger than the sum of its proper divisors (62433291).

811632601 is a wasteful number, since it uses less digits than its factorization.

811632601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62433290.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 811632601 is about 28489.1663795205. The cubic root of 811632601 is about 932.7956118464.

Adding to 811632601 its reverse (106236118), we get a palindrome (917868719).

The spelling of 811632601 in words is "eight hundred eleven million, six hundred thirty-two thousand, six hundred one".