65961524728 has 24 divisors (see below), whose sum is σ = 135943433640. Its totient is φ = 29982510800.

The previous prime is 65961524687. The next prime is 65961524749. The reversal of 65961524728 is 82742516956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34070068 + ... + 34072003.

It is an arithmetic number, because the mean of its divisors is an integer number (5664309735).

Almost surely, 2^65961524728 is an apocalyptic number.

It is an amenable number.

65961524728 is an abundant number, since it is smaller than the sum of its proper divisors (69981908912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65961524728 is a wasteful number, since it uses less digits than its factorization.

65961524728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68142099 (or 68142084 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 55.

The spelling of 65961524728 in words is "sixty-five billion, nine hundred sixty-one million, five hundred twenty-four thousand, seven hundred twenty-eight".