65839693856 has 24 divisors (see below), whose sum is σ = 137246715900. Its totient is φ = 30983385088.

The previous prime is 65839693841. The next prime is 65839693861.

65839693856 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 65784042256 + 55651600 = 256484^2 + 7460^2 .

It is a Harshad number since it is a multiple of its sum of digits (68).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60513881 + ... + 60514968.

Almost surely, 2^65839693856 is an apocalyptic number.

It is an amenable number.

65839693856 is an abundant number, since it is smaller than the sum of its proper divisors (71407022044).

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

65839693856 is a wasteful number, since it uses less digits than its factorization.

65839693856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121028876 (or 121028868 counting only the distinct ones).

The product of its digits is 251942400, while the sum is 68.

The spelling of 65839693856 in words is "sixty-five billion, eight hundred thirty-nine million, six hundred ninety-three thousand, eight hundred fifty-six".