65213261064566 has 4 divisors (see below), whose sum is σ = 97819891596852. Its totient is φ = 32606630532282.

The previous prime is 65213261064559. The next prime is 65213261064619. The reversal of 65213261064566 is 66546016231256.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16303315266140 + ... + 16303315266143.

It is an arithmetic number, because the mean of its divisors is an integer number (24454972899213).

Almost surely, 2^{65213261064566} is an apocalyptic number.

65213261064566 is a deficient number, since it is larger than the sum of its proper divisors (32606630532286).

65213261064566 is a wasteful number, since it uses less digits than its factorization.

65213261064566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32606630532285.

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 65213261064566 in words is "sixty-five trillion, two hundred thirteen billion, two hundred sixty-one million, sixty-four thousand, five hundred sixty-six".