855975680 has 144 divisors (see below), whose sum is σ = 2373525504. Its totient is φ = 289689600.

The previous prime is 855975641. The next prime is 855975683. The reversal of 855975680 is 86579558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855975683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 743105 + ... + 744255.

It is an arithmetic number, because the mean of its divisors is an integer number (16482816).

Almost surely, 2^855975680 is an apocalyptic number.

855975680 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 855975680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1186762752).

855975680 is an abundant number, since it is smaller than the sum of its proper divisors (1517549824).

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

855975680 is a wasteful number, since it uses less digits than its factorization.

855975680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 3024000, while the sum is 53.

The square root of 855975680 is about 29257.0620534598. The cubic root of 855975680 is about 949.4828875469.

The spelling of 855975680 in words is "eight hundred fifty-five million, nine hundred seventy-five thousand, six hundred eighty".