221411761257444 has 12 divisors (see below), whose sum is σ = 516627442934064. Its totient is φ = 73803920419144.

The previous prime is 221411761257437. The next prime is 221411761257521. The reversal of 221411761257444 is 444752167114122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9225490052382 + ... + 9225490052405.

It is an arithmetic number, because the mean of its divisors is an integer number (43052286911172).

Almost surely, 2^{221411761257444} is an apocalyptic number.

It is an amenable number.

221411761257444 is an abundant number, since it is smaller than the sum of its proper divisors (295215681676620).

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

221411761257444 is a wasteful number, since it uses less digits than its factorization.

221411761257444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18450980104794 (or 18450980104792 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 51.

The spelling of 221411761257444 in words is "two hundred twenty-one trillion, four hundred eleven billion, seven hundred sixty-one million, two hundred fifty-seven thousand, four hundred forty-four".