16147388765 has 4 divisors (see below), whose sum is σ = 19376866524. Its totient is φ = 12917911008.

The previous prime is 16147388723. The next prime is 16147388797. The reversal of 16147388765 is 56788374161.

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 12863869561 + 3283519204 = 113419^2 + 57302^2 .

It is a cyclic number.

It is not a de Polignac number, because 16147388765 - 2⁶ = 16147388701 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 16147388765.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1614738872 + ... + 1614738881.

It is an arithmetic number, because the mean of its divisors is an integer number (4844216631).

Almost surely, 2^16147388765 is an apocalyptic number.

It is an amenable number.

16147388765 is a deficient number, since it is larger than the sum of its proper divisors (3229477759).

16147388765 is an equidigital number, since it uses as much as digits as its factorization.

16147388765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3229477758.

The product of its digits is 6773760, while the sum is 56.

The spelling of 16147388765 in words is "sixteen billion, one hundred forty-seven million, three hundred eighty-eight thousand, seven hundred sixty-five".