869135234571 has 16 divisors (see below), whose sum is σ = 1287633627520. Its totient is φ = 579411847080.

The previous prime is 869135234567. The next prime is 869135234599. The reversal of 869135234571 is 175432531968.

It is a happy number.

869135234571 is a `hidden beast` number, since 8 + 6 + 9 + 1 + 3 + 523 + 45 + 71 = 666.

It is not a de Polignac number, because 869135234571 - 2² = 869135234567 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869135234521) 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, 1170696 + ... + 1763178.

It is an arithmetic number, because the mean of its divisors is an integer number (80477101720).

Almost surely, 2^869135234571 is an apocalyptic number.

869135234571 is a deficient number, since it is larger than the sum of its proper divisors (418498392949).

869135234571 is a wasteful number, since it uses less digits than its factorization.

869135234571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646823 (or 646817 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The spelling of 869135234571 in words is "eight hundred sixty-nine billion, one hundred thirty-five million, two hundred thirty-four thousand, five hundred seventy-one".