65107985599 has 4 divisors (see below), whose sum is σ = 65193994264. Its totient is φ = 65021976936.

The previous prime is 65107985597. The next prime is 65107985617. The reversal of 65107985599 is 99558970156.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65107985599 - 2¹ = 65107985597 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 65107985599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65107985597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43003197 + ... + 43004710.

It is an arithmetic number, because the mean of its divisors is an integer number (16298498566).

Almost surely, 2^65107985599 is an apocalyptic number.

65107985599 is a deficient number, since it is larger than the sum of its proper divisors (86008665).

65107985599 is an equidigital number, since it uses as much as digits as its factorization.

65107985599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86008664.

The product of its (nonzero) digits is 30618000, while the sum is 64.

The spelling of 65107985599 in words is "sixty-five billion, one hundred seven million, nine hundred eighty-five thousand, five hundred ninety-nine".