65729804840 has 64 divisors (see below), whose sum is σ = 169041600000. Its totient is φ = 22532986368.

The previous prime is 65729804839. The next prime is 65729804843. The reversal of 65729804840 is 4840892756.

It is not an unprimeable number, because it can be changed into a prime (65729804843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4037036 + ... + 4053284.

It is an arithmetic number, because the mean of its divisors is an integer number (2641275000).

Almost surely, 2^65729804840 is an apocalyptic number.

It is an amenable number.

65729804840 is an abundant number, since it is smaller than the sum of its proper divisors (103311795160).

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

65729804840 is a wasteful number, since it uses less digits than its factorization.

65729804840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30714 (or 30710 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 65729804840 in words is "sixty-five billion, seven hundred twenty-nine million, eight hundred four thousand, eight hundred forty".