16648619684 has 12 divisors (see below), whose sum is σ = 29262313500. Its totient is φ = 8287958688.

The previous prime is 16648619681. The next prime is 16648619711. The reversal of 16648619684 is 48691684661.

It can be written as a sum of positive squares in 2 ways, for example, as 13565260900 + 3083358784 = 116470^2 + 55528^2 .

It is not an unprimeable number, because it can be changed into a prime (16648619681) 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, 9086759 + ... + 9088590.

It is an arithmetic number, because the mean of its divisors is an integer number (2438526125).

Almost surely, 2^16648619684 is an apocalyptic number.

It is an amenable number.

16648619684 is a deficient number, since it is larger than the sum of its proper divisors (12613693816).

16648619684 is a wasteful number, since it uses less digits than its factorization.

16648619684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18175582 (or 18175580 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 59.

The spelling of 16648619684 in words is "sixteen billion, six hundred forty-eight million, six hundred nineteen thousand, six hundred eighty-four".