65217071256 has 16 divisors (see below), whose sum is σ = 163042678200. Its totient is φ = 21739023744.

The previous prime is 65217071237. The next prime is 65217071263.

It is a happy number.

65217071256 is nontrivially palindromic in base 10.

It is a congruent number.

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, 1358688961 + ... + 1358689008.

Almost surely, 2^65217071256 is an apocalyptic number.

It is an amenable number.

65217071256 is an abundant number, since it is smaller than the sum of its proper divisors (97825606944).

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

65217071256 is a wasteful number, since it uses less digits than its factorization.

65217071256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2717377978 (or 2717377974 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 65217071256 in words is "sixty-five billion, two hundred seventeen million, seventy-one thousand, two hundred fifty-six".