855776880 has 160 divisors (see below), whose sum is σ = 3368832000. Its totient is φ = 195602688.

The previous prime is 855776879. The next prime is 855776897. The reversal of 855776880 is 88677558.

It is a happy number.

855776880 is a `hidden beast` number, since 8 + 5 + 577 + 68 + 8 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13180 + ... + 43419.

It is an arithmetic number, because the mean of its divisors is an integer number (21055200).

Almost surely, 2^855776880 is an apocalyptic number.

855776880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855776880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1684416000).

855776880 is an abundant number, since it is smaller than the sum of its proper divisors (2513055120).

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

855776880 is a wasteful number, since it uses less digits than its factorization.

855776880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56628 (or 56616 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 54.

The square root of 855776880 is about 29253.6643858509. The cubic root of 855776880 is about 949.4093761854.

The spelling of 855776880 in words is "eight hundred fifty-five million, seven hundred seventy-six thousand, eight hundred eighty".