855760561000 has 32 divisors (see below), whose sum is σ = 2002479715080. Its totient is φ = 342304224000.

The previous prime is 855760560979. The next prime is 855760561001. The reversal of 855760561000 is 165067558.

It can be written as a sum of positive squares in 4 ways, for example, as 511405195876 + 344355365124 = 715126^2 + 586818^2 .

It is a super-2 number, since 2×855760561000² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (855760561001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427879281 + ... + 427881280.

Almost surely, 2^855760561000 is an apocalyptic number.

It is an amenable number.

855760561000 is an abundant number, since it is smaller than the sum of its proper divisors (1146719154080).

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

855760561000 is a wasteful number, since it uses less digits than its factorization.

855760561000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855760582 (or 855760568 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 855760561000 in words is "eight hundred fifty-five billion, seven hundred sixty million, five hundred sixty-one thousand".