65257766775256 has 16 divisors (see below), whose sum is σ = 133481795676840. Its totient is φ = 29662621261440.

The previous prime is 65257766775241. The next prime is 65257766775269.

65257766775256 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×65257766775256² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370782765681 + ... + 370782765856.

Almost surely, 2^{65257766775256} is an apocalyptic number.

It is an amenable number.

65257766775256 is an abundant number, since it is smaller than the sum of its proper divisors (68224028901584).

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

65257766775256 is a wasteful number, since it uses less digits than its factorization.

65257766775256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741565531554 (or 741565531550 counting only the distinct ones).

The product of its digits is 7779240000, while the sum is 76.

The spelling of 65257766775256 in words is "sixty-five trillion, two hundred fifty-seven billion, seven hundred sixty-six million, seven hundred seventy-five thousand, two hundred fifty-six".