65215521365104 has 80 divisors (see below), whose sum is σ = 138151176330240. Its totient is φ = 29576918004480.

The previous prime is 65215521365087. The next prime is 65215521365117. The reversal of 65215521365104 is 40156312551256.

It is a happy number.

65215521365104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 1267846074 + ... + 1267897510.

It is an arithmetic number, because the mean of its divisors is an integer number (1726889704128).

Almost surely, 2^{65215521365104} is an apocalyptic number.

It is an amenable number.

65215521365104 is an abundant number, since it is smaller than the sum of its proper divisors (72935654965136).

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

65215521365104 is a wasteful number, since it uses less digits than its factorization.

65215521365104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67478 (or 67472 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 46.

The spelling of 65215521365104 in words is "sixty-five trillion, two hundred fifteen billion, five hundred twenty-one million, three hundred sixty-five thousand, one hundred four".