16009776799 has 4 divisors (see below), whose sum is σ = 16010032336. Its totient is φ = 16009521264.

The previous prime is 16009776767. The next prime is 16009776817. The reversal of 16009776799 is 99767790061.

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 a cyclic number.

It is not a de Polignac number, because 16009776799 - 2⁵ = 16009776767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16009776749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37267 + ... + 182779.

It is an arithmetic number, because the mean of its divisors is an integer number (4002508084).

Almost surely, 2^16009776799 is an apocalyptic number.

16009776799 is a deficient number, since it is larger than the sum of its proper divisors (255537).

16009776799 is a wasteful number, since it uses less digits than its factorization.

16009776799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255536.

The product of its (nonzero) digits is 9001692, while the sum is 61.

The spelling of 16009776799 in words is "sixteen billion, nine million, seven hundred seventy-six thousand, seven hundred ninety-nine".