65312543656 has 32 divisors (see below), whose sum is σ = 123603800040. Its totient is φ = 32351807488.

The previous prime is 65312543641. The next prime is 65312543687. The reversal of 65312543656 is 65634521356.

It can be written as a sum of positive squares in 4 ways, for example, as 61083122500 + 4229421156 = 247150^2 + 65034^2 .

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, 2006100 + ... + 2038396.

Almost surely, 2^65312543656 is an apocalyptic number.

It is an amenable number.

65312543656 is a deficient number, since it is larger than the sum of its proper divisors (58291256384).

65312543656 is a wasteful number, since it uses less digits than its factorization.

65312543656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34653 (or 34649 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 46.

The spelling of 65312543656 in words is "sixty-five billion, three hundred twelve million, five hundred forty-three thousand, six hundred fifty-six".