8398764782265 has 32 divisors (see below), whose sum is σ = 15787328489856. Its totient is φ = 3758887733760.

The previous prime is 8398764782263. The next prime is 8398764782267. The reversal of 8398764782265 is 5622874678938.

It is an interprime number because it is at equal distance from previous prime (8398764782263) and next prime (8398764782267).

It is not a de Polignac number, because 8398764782265 - 2¹ = 8398764782263 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8398764782263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1957751884 + ... + 1957756173.

It is an arithmetic number, because the mean of its divisors is an integer number (493354015308).

Almost surely, 2^{8398764782265} is an apocalyptic number.

It is an amenable number.

8398764782265 is a deficient number, since it is larger than the sum of its proper divisors (7388563707591).

8398764782265 is a wasteful number, since it uses less digits than its factorization.

8398764782265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915508089.

The product of its digits is 1950842880, while the sum is 75.

The spelling of 8398764782265 in words is "eight trillion, three hundred ninety-eight billion, seven hundred sixty-four million, seven hundred eighty-two thousand, two hundred sixty-five".