65918332838 has 16 divisors (see below), whose sum is σ = 100873287600. Its totient is φ = 32299001856.

The previous prime is 65918332829. The next prime is 65918332891. The reversal of 65918332838 is 83823381956.

It is a congruent number.

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, 1248563 + ... + 1300286.

It is an arithmetic number, because the mean of its divisors is an integer number (6304580475).

Almost surely, 2^65918332838 is an apocalyptic number.

65918332838 is a deficient number, since it is larger than the sum of its proper divisors (34954954762).

65918332838 is a wasteful number, since it uses less digits than its factorization.

65918332838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2549111.

The product of its digits is 7464960, while the sum is 56.

The spelling of 65918332838 in words is "sixty-five billion, nine hundred eighteen million, three hundred thirty-two thousand, eight hundred thirty-eight".