65512721212 has 6 divisors (see below), whose sum is σ = 114647262128. Its totient is φ = 32756360604.

The previous prime is 65512721207. The next prime is 65512721213. The reversal of 65512721212 is 21212721556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65512721213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8189090148 + ... + 8189090155.

Almost surely, 2^65512721212 is an apocalyptic number.

It is an amenable number.

65512721212 is a deficient number, since it is larger than the sum of its proper divisors (49134540916).

65512721212 is a wasteful number, since it uses less digits than its factorization.

65512721212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16378180307 (or 16378180305 counting only the distinct ones).

The product of its digits is 16800, while the sum is 34.

The spelling of 65512721212 in words is "sixty-five billion, five hundred twelve million, seven hundred twenty-one thousand, two hundred twelve".