16864040837 has 4 divisors (see below), whose sum is σ = 19273189536. Its totient is φ = 14454892140.

The previous prime is 16864040779. The next prime is 16864040857. The reversal of 16864040837 is 73804046861.

It is a happy number.

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 16864040837 - 2⁶ = 16864040773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16864040791 and 16864040800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16864040857) 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, 1204574339 + ... + 1204574352.

It is an arithmetic number, because the mean of its divisors is an integer number (4818297384).

Almost surely, 2^16864040837 is an apocalyptic number.

It is an amenable number.

16864040837 is a deficient number, since it is larger than the sum of its proper divisors (2409148699).

16864040837 is an equidigital number, since it uses as much as digits as its factorization.

16864040837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409148698.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 16864040837 in words is "sixteen billion, eight hundred sixty-four million, forty thousand, eight hundred thirty-seven".