86824738721 has 4 divisors (see below), whose sum is σ = 99228272832. Its totient is φ = 74421204612.

The previous prime is 86824738711. The next prime is 86824738733. The reversal of 86824738721 is 12783742868.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86824738721 - 2¹⁰ = 86824737697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86824738711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6201767045 + ... + 6201767058.

It is an arithmetic number, because the mean of its divisors is an integer number (24807068208).

Almost surely, 2^86824738721 is an apocalyptic number.

It is an amenable number.

86824738721 is a deficient number, since it is larger than the sum of its proper divisors (12403534111).

86824738721 is a wasteful number, since it uses less digits than its factorization.

86824738721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12403534110.

The product of its digits is 7225344, while the sum is 56.

The spelling of 86824738721 in words is "eighty-six billion, eight hundred twenty-four million, seven hundred thirty-eight thousand, seven hundred twenty-one".