855605712366 has 96 divisors (see below), whose sum is σ = 1991698450560. Its totient is φ = 274961088864.

The previous prime is 855605712329. The next prime is 855605712391. The reversal of 855605712366 is 663217506558.

It is a happy number.

855605712366 is a `hidden beast` number, since 8 + 5 + 5 + 6 + 0 + 571 + 2 + 3 + 66 = 666.

It is a super-2 number, since 2×855605712366² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9581761 + ... + 9670643.

It is an arithmetic number, because the mean of its divisors is an integer number (20746858860).

Almost surely, 2^855605712366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855605712366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995849225280).

855605712366 is an abundant number, since it is smaller than the sum of its proper divisors (1136092738194).

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

855605712366 is a wasteful number, since it uses less digits than its factorization.

855605712366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89612 (or 89600 counting only the distinct ones).

The product of its (nonzero) digits is 9072000, while the sum is 54.

The spelling of 855605712366 in words is "eight hundred fifty-five billion, six hundred five million, seven hundred twelve thousand, three hundred sixty-six".