811740563 has 4 divisors (see below), whose sum is σ = 822015840. Its totient is φ = 801465288.

The previous prime is 811740557. The next prime is 811740571. The reversal of 811740563 is 365047118.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365047118 = 2 ⋅182523559.

It is a cyclic number.

It is not a de Polignac number, because 811740563 - 2⁴ = 811740547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811740533) 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, 5137520 + ... + 5137677.

It is an arithmetic number, because the mean of its divisors is an integer number (205503960).

Almost surely, 2^811740563 is an apocalyptic number.

811740563 is a deficient number, since it is larger than the sum of its proper divisors (10275277).

811740563 is a wasteful number, since it uses less digits than its factorization.

811740563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10275276.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 811740563 is about 28491.0611069507. The cubic root of 811740563 is about 932.8369696458.

The spelling of 811740563 in words is "eight hundred eleven million, seven hundred forty thousand, five hundred sixty-three".