65517025440 has 96 divisors (see below), whose sum is σ = 206473095360. Its totient is φ = 17463209984.

The previous prime is 65517025397. The next prime is 65517025477. The reversal of 65517025440 is 4452071556.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1058056 + ... + 1118264.

It is an arithmetic number, because the mean of its divisors is an integer number (2150761410).

Almost surely, 2^65517025440 is an apocalyptic number.

65517025440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65517025440 is an abundant number, since it is smaller than the sum of its proper divisors (140956069920).

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

65517025440 is a wasteful number, since it uses less digits than its factorization.

65517025440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62494 (or 62486 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 39.

Adding to 65517025440 its reverse (4452071556), we get a palindrome (69969096996).

The spelling of 65517025440 in words is "sixty-five billion, five hundred seventeen million, twenty-five thousand, four hundred forty".