12865508163 has 12 divisors (see below), whose sum is σ = 18595011240. Its totient is φ = 8571698016.

The previous prime is 12865508143. The next prime is 12865508189. The reversal of 12865508163 is 36180556821.

12865508163 is a `hidden beast` number, since 1 + 2 + 86 + 5 + 508 + 1 + 63 = 666.

It is not a de Polignac number, because 12865508163 - 2¹³ = 12865499971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12865508143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 426906 + ... + 456047.

It is an arithmetic number, because the mean of its divisors is an integer number (1549584270).

Almost surely, 2^12865508163 is an apocalyptic number.

12865508163 is a deficient number, since it is larger than the sum of its proper divisors (5729503077).

12865508163 is a wasteful number, since it uses less digits than its factorization.

12865508163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884578 (or 884575 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The spelling of 12865508163 in words is "twelve billion, eight hundred sixty-five million, five hundred eight thousand, one hundred sixty-three".