810040268869 has 4 divisors (see below), whose sum is σ = 872351058796. Its totient is φ = 747729478944.

The previous prime is 810040268837. The next prime is 810040268923. The reversal of 810040268869 is 968862040018.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47495664225 + 762544604644 = 217935^2 + 873238^2 .

It is a cyclic number.

It is not a de Polignac number, because 810040268869 - 2⁵ = 810040268837 is a prime.

It is a super-2 number, since 2×810040268869² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (810040266869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31155394944 + ... + 31155394969.

It is an arithmetic number, because the mean of its divisors is an integer number (218087764699).

Almost surely, 2^810040268869 is an apocalyptic number.

It is an amenable number.

810040268869 is a deficient number, since it is larger than the sum of its proper divisors (62310789927).

810040268869 is a wasteful number, since it uses less digits than its factorization.

810040268869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62310789926.

The product of its (nonzero) digits is 1327104, while the sum is 52.

The spelling of 810040268869 in words is "eight hundred ten billion, forty million, two hundred sixty-eight thousand, eight hundred sixty-nine".