65480322521 has 4 divisors (see below), whose sum is σ = 65606005044. Its totient is φ = 65354640000.

The previous prime is 65480322493. The next prime is 65480322527. The reversal of 65480322521 is 12522308456.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19913443225 + 45566879296 = 141115^2 + 213464^2 .

It is a cyclic number.

It is not a de Polignac number, because 65480322521 - 2¹⁴ = 65480306137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65480322527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62840480 + ... + 62841521.

It is an arithmetic number, because the mean of its divisors is an integer number (16401501261).

Almost surely, 2^65480322521 is an apocalyptic number.

It is an amenable number.

65480322521 is a deficient number, since it is larger than the sum of its proper divisors (125682523).

65480322521 is a wasteful number, since it uses less digits than its factorization.

65480322521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125682522.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 65480322521 in words is "sixty-five billion, four hundred eighty million, three hundred twenty-two thousand, five hundred twenty-one".