16949808839645 has 8 divisors (see below), whose sum is σ = 22188840662880. Its totient is φ = 12327133701520.

The previous prime is 16949808839609. The next prime is 16949808839647. The reversal of 16949808839645 is 54693880894961.

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

It is not a de Polignac number, because 16949808839645 - 2⁶ = 16949808839581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16949808839645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16949808839647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154089171215 + ... + 154089171324.

It is an arithmetic number, because the mean of its divisors is an integer number (2773605082860).

Almost surely, 2^{16949808839645} is an apocalyptic number.

It is an amenable number.

16949808839645 is a deficient number, since it is larger than the sum of its proper divisors (5239031823235).

16949808839645 is a wasteful number, since it uses less digits than its factorization.

16949808839645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308178342555.

The product of its (nonzero) digits is 3224862720, while the sum is 80.

The spelling of 16949808839645 in words is "sixteen trillion, nine hundred forty-nine billion, eight hundred eight million, eight hundred thirty-nine thousand, six hundred forty-five".