65521607012 has 6 divisors (see below), whose sum is σ = 114662812278. Its totient is φ = 32760803504.

The previous prime is 65521606981. The next prime is 65521607017. The reversal of 65521607012 is 21070612556.

It can be written as a sum of positive squares in only one way, i.e., 60686351716 + 4835255296 = 246346^2 + 69536^2 .

It is not an unprimeable number, because it can be changed into a prime (65521607017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8190200873 + ... + 8190200880.

It is an arithmetic number, because the mean of its divisors is an integer number (19110468713).

Almost surely, 2^65521607012 is an apocalyptic number.

It is an amenable number.

65521607012 is a deficient number, since it is larger than the sum of its proper divisors (49141205266).

65521607012 is a wasteful number, since it uses less digits than its factorization.

65521607012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16380401757 (or 16380401755 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The spelling of 65521607012 in words is "sixty-five billion, five hundred twenty-one million, six hundred seven thousand, twelve".