16368806765 has 4 divisors (see below), whose sum is σ = 19642568124. Its totient is φ = 13095045408.

The previous prime is 16368806759. The next prime is 16368806803. The reversal of 16368806765 is 56760886361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8100360004 + 8268446761 = 90002^2 + 90931^2 .

It is a cyclic number.

It is not a de Polignac number, because 16368806765 - 2²² = 16364612461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16368806765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1636880672 + ... + 1636880681.

It is an arithmetic number, because the mean of its divisors is an integer number (4910642031).

Almost surely, 2^16368806765 is an apocalyptic number.

It is an amenable number.

16368806765 is a deficient number, since it is larger than the sum of its proper divisors (3273761359).

16368806765 is an equidigital number, since it uses as much as digits as its factorization.

16368806765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3273761358.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 16368806765 in words is "sixteen billion, three hundred sixty-eight million, eight hundred six thousand, seven hundred sixty-five".