65261216256 has 80 divisors (see below), whose sum is σ = 175581762048. Its totient is φ = 21538304000.

The previous prime is 65261216249. The next prime is 65261216257.

It is a happy number.

65261216256 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (65261216257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55200 + ... + 365471.

Almost surely, 2^65261216256 is an apocalyptic number.

It is an amenable number.

65261216256 is an abundant number, since it is smaller than the sum of its proper divisors (110320545792).

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

65261216256 is a wasteful number, since it uses less digits than its factorization.

65261216256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420793 (or 420777 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The spelling of 65261216256 in words is "sixty-five billion, two hundred sixty-one million, two hundred sixteen thousand, two hundred fifty-six".