800243991756 has 36 divisors (see below), whose sum is σ = 2206733432904. Its totient is φ = 242498179200.

The previous prime is 800243991647. The next prime is 800243991763. The reversal of 800243991756 is 657199342008.

800243991756 is a `hidden beast` number, since 80 + 0 + 2 + 4 + 399 + 175 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1010408685 + ... + 1010409476.

It is an arithmetic number, because the mean of its divisors is an integer number (61298150914).

It is a 3-persistent number, because k⋅800243991756 is pandigital for 1 ≤ k ≤ 3, but not for k = 4.

Almost surely, 2^800243991756 is an apocalyptic number.

It is an amenable number.

800243991756 is an abundant number, since it is smaller than the sum of its proper divisors (1406489441148).

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

800243991756 is a wasteful number, since it uses less digits than its factorization.

800243991756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020818182 (or 2020818177 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 800243991756 in words is "eight hundred billion, two hundred forty-three million, nine hundred ninety-one thousand, seven hundred fifty-six".