244220016220781 has 4 divisors (see below), whose sum is σ = 244229200558464. Its totient is φ = 244210831883100.

The previous prime is 244220016220759. The next prime is 244220016220841. The reversal of 244220016220781 is 187022610022442.

It is a happy number.

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 244220016220781 - 2²⁶ = 244219949111917 is a prime.

It is a super-2 number, since 2×244220016220781² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244220016220711) 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, 4592128955 + ... + 4592182136.

It is an arithmetic number, because the mean of its divisors is an integer number (61057300139616).

Almost surely, 2^{244220016220781} is an apocalyptic number.

It is an amenable number.

244220016220781 is a deficient number, since it is larger than the sum of its proper divisors (9184337683).

244220016220781 is an equidigital number, since it uses as much as digits as its factorization.

244220016220781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9184337682.

The product of its (nonzero) digits is 172032, while the sum is 41.

The spelling of 244220016220781 in words is "two hundred forty-four trillion, two hundred twenty billion, sixteen million, two hundred twenty thousand, seven hundred eighty-one".