65107985618 has 16 divisors (see below), whose sum is σ = 105245516376. Its totient is φ = 30029531520.

The previous prime is 65107985617. The next prime is 65107985623. The reversal of 65107985618 is 81658970156.

It can be written as a sum of positive squares in 4 ways, for example, as 44874914569 + 20233071049 = 211837^2 + 142243^2 .

It is not an unprimeable number, because it can be changed into a prime (65107985617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 806921 + ... + 883932.

Almost surely, 2^65107985618 is an apocalyptic number.

65107985618 is a deficient number, since it is larger than the sum of its proper divisors (40137530758).

65107985618 is a wasteful number, since it uses less digits than its factorization.

65107985618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692349.

The product of its (nonzero) digits is 3628800, while the sum is 56.

The spelling of 65107985618 in words is "sixty-five billion, one hundred seven million, nine hundred eighty-five thousand, six hundred eighteen".