65016565999 has 16 divisors (see below), whose sum is σ = 81398799360. Its totient is φ = 50450268960.

The previous prime is 65016565997. The next prime is 65016566059. The reversal of 65016565999 is 99956561056.

65016565999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65016565999 - 2¹ = 65016565997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65016565997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1748064 + ... + 1784869.

It is an arithmetic number, because the mean of its divisors is an integer number (5087424960).

Almost surely, 2^65016565999 is an apocalyptic number.

65016565999 is a deficient number, since it is larger than the sum of its proper divisors (16382233361).

65016565999 is a wasteful number, since it uses less digits than its factorization.

65016565999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3533190.

The product of its (nonzero) digits is 19683000, while the sum is 61.

The spelling of 65016565999 in words is "sixty-five billion, sixteen million, five hundred sixty-five thousand, nine hundred ninety-nine".