16777212765 has 16 divisors (see below), whose sum is σ = 26958754368. Its totient is φ = 8909442176.

The previous prime is 16777212763. The next prime is 16777212779. The reversal of 16777212765 is 56721277761.

It is a cyclic number.

It is not a de Polignac number, because 16777212765 - 2¹ = 16777212763 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16777212761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2396679 + ... + 2403668.

It is an arithmetic number, because the mean of its divisors is an integer number (1684922148).

Almost surely, 2^16777212765 is an apocalyptic number.

16777212765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16777212765 is a deficient number, since it is larger than the sum of its proper divisors (10181541603).

16777212765 is a wasteful number, since it uses less digits than its factorization.

16777212765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4800588.

The product of its digits is 1728720, while the sum is 51.

The spelling of 16777212765 in words is "sixteen billion, seven hundred seventy-seven million, two hundred twelve thousand, seven hundred sixty-five".