855609552 has 120 divisors (see below), whose sum is σ = 2749091904. Its totient is φ = 243343872.

The previous prime is 855609551. The next prime is 855609619. The reversal of 855609552 is 255906558.

855609552 is a `hidden beast` number, since 8 + 556 + 0 + 95 + 5 + 2 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 855609498 and 855609507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855609551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 233043 + ... + 236685.

Almost surely, 2^855609552 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 855609552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1374545952).

855609552 is an abundant number, since it is smaller than the sum of its proper divisors (1893482352).

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

855609552 is a wasteful number, since it uses less digits than its factorization.

855609552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897 (or 3888 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 45.

The square root of 855609552 is about 29250.8042966343. The cubic root of 855609552 is about 949.3474935729.

The spelling of 855609552 in words is "eight hundred fifty-five million, six hundred nine thousand, five hundred fifty-two".