16263983976769 has 3 divisors (see below), whose sum is σ = 16263988009633. Its totient is φ = 16263979943906.

The previous prime is 16263983976767. The next prime is 16263983976817. The reversal of 16263983976769 is 96767938936261.

The square root of 16263983976769 is 4032863.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 16263983976769 - 2¹ = 16263983976767 is a prime.

It is a super-2 number, since 2×16263983976769² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16263983976692 and 16263983976701.

It is not an unprimeable number, because it can be changed into a prime (16263983976767) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2016432 + ... + 6049294.

Almost surely, 2^{16263983976769} is an apocalyptic number.

16263983976769 is the 4032863-rd square number.

16263983976769 is the 2016432-nd centered octagonal number.

It is an amenable number.

16263983976769 is a deficient number, since it is larger than the sum of its proper divisors (4032864).

16263983976769 is an frugal number, since it uses more digits than its factorization.

16263983976769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8065726 (or 4032863 counting only the distinct ones).

The product of its digits is 6666395904, while the sum is 82.

The spelling of 16263983976769 in words is "sixteen trillion, two hundred sixty-three billion, nine hundred eighty-three million, nine hundred seventy-six thousand, seven hundred sixty-nine".