65319918012 has 72 divisors (see below), whose sum is σ = 171179583120. Its totient is φ = 20986279680.

The previous prime is 65319917987. The next prime is 65319918031. The reversal of 65319918012 is 21081991356.

65319918012 is a `hidden beast` number, since 6 + 531 + 99 + 18 + 0 + 12 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144087 + ... + 389102.

It is an arithmetic number, because the mean of its divisors is an integer number (2377494210).

Almost surely, 2^65319918012 is an apocalyptic number.

It is an amenable number.

65319918012 is an abundant number, since it is smaller than the sum of its proper divisors (105859665108).

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

65319918012 is a wasteful number, since it uses less digits than its factorization.

65319918012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533323 (or 533318 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The spelling of 65319918012 in words is "sixty-five billion, three hundred nineteen million, nine hundred eighteen thousand, twelve".