11856495563 has 8 divisors (see below), whose sum is σ = 13002080256. Its totient is φ = 10722197800.

The previous prime is 11856495529. The next prime is 11856495571. The reversal of 11856495563 is 36559465811.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11856495563 - 2⁶ = 11856495499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11856495503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2819531 + ... + 2823732.

It is an arithmetic number, because the mean of its divisors is an integer number (1625260032).

Almost surely, 2^11856495563 is an apocalyptic number.

11856495563 is a deficient number, since it is larger than the sum of its proper divisors (1145584693).

11856495563 is a wasteful number, since it uses less digits than its factorization.

11856495563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5643465.

The product of its digits is 3888000, while the sum is 53.

The spelling of 11856495563 in words is "eleven billion, eight hundred fifty-six million, four hundred ninety-five thousand, five hundred sixty-three".