16394502777 has 4 divisors (see below), whose sum is σ = 21859337040. Its totient is φ = 10929668516.

The previous prime is 16394502743. The next prime is 16394502791. The reversal of 16394502777 is 77720549361.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16394502777 - 2⁶ = 16394502713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16394502797) 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, 2732417127 + ... + 2732417132.

It is an arithmetic number, because the mean of its divisors is an integer number (5464834260).

Almost surely, 2^16394502777 is an apocalyptic number.

It is an amenable number.

16394502777 is a deficient number, since it is larger than the sum of its proper divisors (5464834263).

16394502777 is an equidigital number, since it uses as much as digits as its factorization.

16394502777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5464834262.

The product of its (nonzero) digits is 2222640, while the sum is 51.

The spelling of 16394502777 in words is "sixteen billion, three hundred ninety-four million, five hundred two thousand, seven hundred seventy-seven".