65252202621640 has 64 divisors (see below), whose sum is σ = 149308197480000. Its totient is φ = 25658096236800.

The previous prime is 65252202621607. The next prime is 65252202621757. The reversal of 65252202621640 is 4612620225256.

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, 187089415 + ... + 187437865.

It is an arithmetic number, because the mean of its divisors is an integer number (2332940585625).

Almost surely, 2^{65252202621640} is an apocalyptic number.

It is an amenable number.

65252202621640 is an abundant number, since it is smaller than the sum of its proper divisors (84055994858360).

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

65252202621640 is a wasteful number, since it uses less digits than its factorization.

65252202621640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427870 (or 427866 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

Adding to 65252202621640 its reverse (4612620225256), we get a palindrome (69864822846896).

The spelling of 65252202621640 in words is "sixty-five trillion, two hundred fifty-two billion, two hundred two million, six hundred twenty-one thousand, six hundred forty".