811056220263 has 16 divisors (see below), whose sum is σ = 1201644033760. Its totient is φ = 540668478528.

The previous prime is 811056220199. The next prime is 811056220313. The reversal of 811056220263 is 362022650118.

811056220263 is a `hidden beast` number, since 8 + 1 + 1 + 0 + 5 + 622 + 0 + 26 + 3 = 666.

It is not a de Polignac number, because 811056220263 - 2⁶ = 811056220199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811056240263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 570670 + ... + 1395627.

It is an arithmetic number, because the mean of its divisors is an integer number (75102752110).

Almost surely, 2^811056220263 is an apocalyptic number.

811056220263 is a deficient number, since it is larger than the sum of its proper divisors (390587813497).

811056220263 is a wasteful number, since it uses less digits than its factorization.

811056220263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981583 (or 1981577 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 811056220263 in words is "eight hundred eleven billion, fifty-six million, two hundred twenty thousand, two hundred sixty-three".