855613863 has 24 divisors (see below), whose sum is σ = 1366933568. Its totient is φ = 512298432.

The previous prime is 855613853. The next prime is 855613901. The reversal of 855613863 is 368316558.

855613863 is a `hidden beast` number, since 8 + 5 + 561 + 3 + 86 + 3 = 666.

It is not a de Polignac number, because 855613863 - 2¹⁷ = 855482791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855613853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94495 + ... + 103152.

Almost surely, 2^855613863 is an apocalyptic number.

855613863 is a deficient number, since it is larger than the sum of its proper divisors (511319705).

855613863 is a wasteful number, since it uses less digits than its factorization.

855613863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197703 (or 197700 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 855613863 is about 29250.8779868229. The cubic root of 855613863 is about 949.3490880035.

The spelling of 855613863 in words is "eight hundred fifty-five million, six hundred thirteen thousand, eight hundred sixty-three".