855860909904 has 240 divisors, whose sum is σ = 3215962748544. Its totient is φ = 205201382400.

The previous prime is 855860909881. The next prime is 855860909909. The reversal of 855860909904 is 409909068558.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855860909909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2824627 + ... + 3112914.

Almost surely, 2^855860909904 is an apocalyptic number.

855860909904 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

855860909904 is an abundant number, since it is smaller than the sum of its proper divisors (2360101838640).

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

855860909904 is a wasteful number, since it uses less digits than its factorization.

855860909904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5937586 (or 5937577 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 63.

The spelling of 855860909904 in words is "eight hundred fifty-five billion, eight hundred sixty million, nine hundred nine thousand, nine hundred four".