16777920378311 has 16 divisors (see below), whose sum is σ = 17587178908416. Its totient is φ = 15975346892736.

The previous prime is 16777920378293. The next prime is 16777920378319. The reversal of 16777920378311 is 11387302977761.

It is a cyclic number.

It is not a de Polignac number, because 16777920378311 - 2²⁶ = 16777853269447 is a prime.

It is a super-2 number, since 2×16777920378311² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16777920378319) 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, 19968656 + ... + 20791898.

It is an arithmetic number, because the mean of its divisors is an integer number (1099198681776).

Almost surely, 2^{16777920378311} is an apocalyptic number.

16777920378311 is a deficient number, since it is larger than the sum of its proper divisors (809258530105).

16777920378311 is a wasteful number, since it uses less digits than its factorization.

16777920378311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827302.

The product of its (nonzero) digits is 18670176, while the sum is 62.

The spelling of 16777920378311 in words is "sixteen trillion, seven hundred seventy-seven billion, nine hundred twenty million, three hundred seventy-eight thousand, three hundred eleven".