65016644989 has 16 divisors (see below), whose sum is σ = 68005042560. Its totient is φ = 62108893440.

The previous prime is 65016644963. The next prime is 65016645037. The reversal of 65016644989 is 98944661056.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65016644989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65016644489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289354 + ... + 462340.

It is an arithmetic number, because the mean of its divisors is an integer number (4250315160).

Almost surely, 2^65016644989 is an apocalyptic number.

It is an amenable number.

65016644989 is a deficient number, since it is larger than the sum of its proper divisors (2988397571).

65016644989 is a wasteful number, since it uses less digits than its factorization.

65016644989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173220.

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 65016644989 in words is "sixty-five billion, sixteen million, six hundred forty-four thousand, nine hundred eighty-nine".