65609685028 has 24 divisors (see below), whose sum is σ = 118786966200. Its totient is φ = 31670757888.

The previous prime is 65609685019. The next prime is 65609685049. The reversal of 65609685028 is 82058690656.

It can be written as a sum of positive squares in 4 ways, for example, as 69588964 + 65540096064 = 8342^2 + 256008^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65609685028.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1825326 + ... + 1860922.

It is an arithmetic number, because the mean of its divisors is an integer number (4949456925).

Almost surely, 2^65609685028 is an apocalyptic number.

It is an amenable number.

65609685028 is a deficient number, since it is larger than the sum of its proper divisors (53177281172).

65609685028 is a wasteful number, since it uses less digits than its factorization.

65609685028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51519 (or 51517 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 65609685028 in words is "sixty-five billion, six hundred nine million, six hundred eighty-five thousand, twenty-eight".