2169716765 has 8 divisors (see below), whose sum is σ = 2610155448. Its totient is φ = 1731443200.

The previous prime is 2169716743. The next prime is 2169716771. The reversal of 2169716765 is 5676179612.

It can be written as a sum of positive squares in 4 ways, for example, as 891082201 + 1278634564 = 29851^2 + 35758^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2169716765 - 2⁸ = 2169716509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539072 + ... + 543081.

It is an arithmetic number, because the mean of its divisors is an integer number (326269431).

Almost surely, 2^2169716765 is an apocalyptic number.

It is an amenable number.

2169716765 is a deficient number, since it is larger than the sum of its proper divisors (440438683).

2169716765 is a wasteful number, since it uses less digits than its factorization.

2169716765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082559.

The product of its digits is 952560, while the sum is 50.

The square root of 2169716765 is about 46580.2186018915. The cubic root of 2169716765 is about 1294.5962605983.

The spelling of 2169716765 in words is "two billion, one hundred sixty-nine million, seven hundred sixteen thousand, seven hundred sixty-five".