8135531563 has 16 divisors (see below), whose sum is σ = 8299389600. Its totient is φ = 7973602560.

The previous prime is 8135531527. The next prime is 8135531581. The reversal of 8135531563 is 3651355318.

It is not a de Polignac number, because 8135531563 - 2⁹ = 8135531051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8135531513) 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, 6706345 + ... + 6707557.

It is an arithmetic number, because the mean of its divisors is an integer number (518711850).

Almost surely, 2^8135531563 is an apocalyptic number.

8135531563 is a deficient number, since it is larger than the sum of its proper divisors (163858037).

8135531563 is a wasteful number, since it uses less digits than its factorization.

8135531563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902.

The product of its digits is 162000, while the sum is 40.

The square root of 8135531563 is about 90197.1815690490. The cubic root of 8135531563 is about 2011.2311099457.

The spelling of 8135531563 in words is "eight billion, one hundred thirty-five million, five hundred thirty-one thousand, five hundred sixty-three".