65644791812770 has 16 divisors (see below), whose sum is σ = 119091023889408. Its totient is φ = 26051161474800.

The previous prime is 65644791812731. The next prime is 65644791812849. The reversal of 65644791812770 is 7721819744656.

It is a junction number, because it is equal to n+sod(n) for n = 65644791812696 and 65644791812705.

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, 25844404956 + ... + 25844407495.

It is an arithmetic number, because the mean of its divisors is an integer number (7443188993088).

Almost surely, 2^{65644791812770} is an apocalyptic number.

65644791812770 is a deficient number, since it is larger than the sum of its proper divisors (53446232076638).

65644791812770 is a wasteful number, since it uses less digits than its factorization.

65644791812770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51688812585.

The product of its (nonzero) digits is 142248960, while the sum is 67.

The spelling of 65644791812770 in words is "sixty-five trillion, six hundred forty-four billion, seven hundred ninety-one million, eight hundred twelve thousand, seven hundred seventy".