855517656 has 96 divisors (see below), whose sum is σ = 2634398640. Its totient is φ = 230049792.

The previous prime is 855517651. The next prime is 855517657. The reversal of 855517656 is 656715558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855517651) 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 23 ways as a sum of consecutive naturals, for example, 1405 + ... + 41388.

Almost surely, 2^855517656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855517656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1317199320).

855517656 is an abundant number, since it is smaller than the sum of its proper divisors (1778880984).

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

855517656 is a wasteful number, since it uses less digits than its factorization.

855517656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42833 (or 42822 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 48.

The square root of 855517656 is about 29249.2334258524. The cubic root of 855517656 is about 949.3135044086.

The spelling of 855517656 in words is "eight hundred fifty-five million, five hundred seventeen thousand, six hundred fifty-six".