65221426744 has 8 divisors (see below), whose sum is σ = 122290175160. Its totient is φ = 32610713368.

The previous prime is 65221426729. The next prime is 65221426747. The reversal of 65221426744 is 44762412256.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 65221426744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65221426747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4076339164 + ... + 4076339179.

It is an arithmetic number, because the mean of its divisors is an integer number (15286271895).

Almost surely, 2^65221426744 is an apocalyptic number.

It is an amenable number.

65221426744 is a deficient number, since it is larger than the sum of its proper divisors (57068748416).

65221426744 is a wasteful number, since it uses less digits than its factorization.

65221426744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8152678349 (or 8152678345 counting only the distinct ones).

The product of its digits is 645120, while the sum is 43.

The spelling of 65221426744 in words is "sixty-five billion, two hundred twenty-one million, four hundred twenty-six thousand, seven hundred forty-four".