65221922896 has 160 divisors (see below), whose sum is σ = 149390438400. Its totient is φ = 27311800320.

The previous prime is 65221922893. The next prime is 65221922933. The reversal of 65221922896 is 69822912256.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65221922893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14552976 + ... + 14557456.

It is an arithmetic number, because the mean of its divisors is an integer number (933690240).

Almost surely, 2^65221922896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65221922896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74695219200).

65221922896 is an abundant number, since it is smaller than the sum of its proper divisors (84168515504).

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

65221922896 is a wasteful number, since it uses less digits than its factorization.

65221922896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4677 (or 4671 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 52.

The spelling of 65221922896 in words is "sixty-five billion, two hundred twenty-one million, nine hundred twenty-two thousand, eight hundred ninety-six".