65539978830 has 96 divisors (see below), whose sum is σ = 185557975200. Its totient is φ = 15986509056.

The previous prime is 65539978799. The next prime is 65539978871. The reversal of 65539978830 is 3887993556.

65539978830 is a `hidden beast` number, since 6 + 5 + 539 + 97 + 8 + 8 + 3 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 611229 + ... + 710408.

It is an arithmetic number, because the mean of its divisors is an integer number (1932895575).

Almost surely, 2^65539978830 is an apocalyptic number.

65539978830 is an abundant number, since it is smaller than the sum of its proper divisors (120017996370).

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

65539978830 is a wasteful number, since it uses less digits than its factorization.

65539978830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321698 (or 1321695 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 63.

The spelling of 65539978830 in words is "sixty-five billion, five hundred thirty-nine million, nine hundred seventy-eight thousand, eight hundred thirty".