16637374782109 has 4 divisors (see below), whose sum is σ = 16721828461404. Its totient is φ = 16552921102816.

The previous prime is 16637374782089. The next prime is 16637374782151. The reversal of 16637374782109 is 90128747373661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8609236222500 + 8028138559609 = 2934150^2 + 2833397^2 .

It is a cyclic number.

It is not a de Polignac number, because 16637374782109 - 2¹³ = 16637374773917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16637374782169) 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, 42226839352 + ... + 42226839745.

It is an arithmetic number, because the mean of its divisors is an integer number (4180457115351).

Almost surely, 2^{16637374782109} is an apocalyptic number.

It is an amenable number.

16637374782109 is a deficient number, since it is larger than the sum of its proper divisors (84453679295).

16637374782109 is an equidigital number, since it uses as much as digits as its factorization.

16637374782109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84453679294.

The product of its (nonzero) digits is 64012032, while the sum is 64.

The spelling of 16637374782109 in words is "sixteen trillion, six hundred thirty-seven billion, three hundred seventy-four million, seven hundred eighty-two thousand, one hundred nine".