65491208008 has 16 divisors (see below), whose sum is σ = 123505821180. Its totient is φ = 32556322368.

The previous prime is 65491207997. The next prime is 65491208011. The reversal of 65491208008 is 80080219456.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52825506244 + 12665701764 = 229838^2 + 112542^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 23658735 + ... + 23661502.

Almost surely, 2^65491208008 is an apocalyptic number.

It is an amenable number.

65491208008 is a deficient number, since it is larger than the sum of its proper divisors (58014613172).

65491208008 is a wasteful number, since it uses less digits than its factorization.

65491208008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47320416 (or 47320412 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 65491208008 in words is "sixty-five billion, four hundred ninety-one million, two hundred eight thousand, eight".