8215696765 has 4 divisors (see below), whose sum is σ = 9858836124. Its totient is φ = 6572557408.

The previous prime is 8215696759. The next prime is 8215696793. The reversal of 8215696765 is 5676965128.

8215696765 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 1001912409 + 7213784356 = 31653^2 + 84934^2 .

It is a cyclic number.

It is not a de Polignac number, because 8215696765 - 2¹⁵ = 8215663997 is a prime.

It is a Duffinian number.

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, 821569672 + ... + 821569681.

It is an arithmetic number, because the mean of its divisors is an integer number (2464709031).

Almost surely, 2^8215696765 is an apocalyptic number.

It is an amenable number.

8215696765 is a deficient number, since it is larger than the sum of its proper divisors (1643139359).

8215696765 is a wasteful number, since it uses less digits than its factorization.

8215696765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643139358.

The product of its digits is 5443200, while the sum is 55.

The square root of 8215696765 is about 90640.4808294837. The cubic root of 8215696765 is about 2017.8155620775.

The spelling of 8215696765 in words is "eight billion, two hundred fifteen million, six hundred ninety-six thousand, seven hundred sixty-five".