16777956789 has 40 divisors (see below), whose sum is σ = 27366366720. Its totient is φ = 10159344000.

The previous prime is 16777956787. The next prime is 16777956799. The reversal of 16777956789 is 98765977761.

It is not a de Polignac number, because 16777956789 - 2¹ = 16777956787 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16777956787) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1062252 + ... + 1077930.

It is an arithmetic number, because the mean of its divisors is an integer number (684159168).

Almost surely, 2^16777956789 is an apocalyptic number.

It is an amenable number.

16777956789 is a deficient number, since it is larger than the sum of its proper divisors (10588409931).

16777956789 is a wasteful number, since it uses less digits than its factorization.

16777956789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16903 (or 16894 counting only the distinct ones).

The product of its digits is 280052640, while the sum is 72.

The spelling of 16777956789 in words is "sixteen billion, seven hundred seventy-seven million, nine hundred fifty-six thousand, seven hundred eighty-nine".