16640344626 has 8 divisors (see below), whose sum is σ = 33280689264. Its totient is φ = 5546781540.

The previous prime is 16640344619. The next prime is 16640344649. The reversal of 16640344626 is 62644304661.

It is a sphenic number, since it is the product of 3 distinct primes.

16640344626 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1386695380 + ... + 1386695391.

It is an arithmetic number, because the mean of its divisors is an integer number (4160086158).

Almost surely, 2^16640344626 is an apocalyptic number.

16640344626 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16640344626 is a wasteful number, since it uses less digits than its factorization.

16640344626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773390776.

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 16640344626 in words is "sixteen billion, six hundred forty million, three hundred forty-four thousand, six hundred twenty-six".