65633484521 has 4 divisors (see below), whose sum is σ = 71600164944. Its totient is φ = 59666804100.

The previous prime is 65633484493. The next prime is 65633484523. The reversal of 65633484521 is 12548433656.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65633484521 - 2²⁶ = 65566375657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65633484523) 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, 2983340195 + ... + 2983340216.

It is an arithmetic number, because the mean of its divisors is an integer number (17900041236).

Almost surely, 2^65633484521 is an apocalyptic number.

It is an amenable number.

65633484521 is a deficient number, since it is larger than the sum of its proper divisors (5966680423).

65633484521 is a wasteful number, since it uses less digits than its factorization.

65633484521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5966680422.

The product of its digits is 2073600, while the sum is 47.

The spelling of 65633484521 in words is "sixty-five billion, six hundred thirty-three million, four hundred eighty-four thousand, five hundred twenty-one".