800485025781 has 16 divisors (see below), whose sum is σ = 1223281808000. Its totient is φ = 456109351488.

The previous prime is 800485025761. The next prime is 800485025881. The reversal of 800485025781 is 187520584008.

It is not a de Polignac number, because 800485025781 - 2¹¹ = 800485023733 is a prime.

It is a super-2 number, since 2×800485025781² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 800485025781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800485025761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54603466 + ... + 54618123.

It is an arithmetic number, because the mean of its divisors is an integer number (76455113000).

Almost surely, 2^800485025781 is an apocalyptic number.

It is an amenable number.

800485025781 is a deficient number, since it is larger than the sum of its proper divisors (422796782219).

800485025781 is a wasteful number, since it uses less digits than its factorization.

800485025781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109221948.

The product of its (nonzero) digits is 716800, while the sum is 48.

The spelling of 800485025781 in words is "eight hundred billion, four hundred eighty-five million, twenty-five thousand, seven hundred eighty-one".