544122221491 has 2 divisors, whose sum is σ = 544122221492. Its totient is φ = 544122221490.

The previous prime is 544122221443. The next prime is 544122221497. The reversal of 544122221491 is 194122221445.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 544122221491 - 2¹⁷ = 544122090419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 544122221491.

It is not a weakly prime, because it can be changed into another prime (544122221497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272061110745 + 272061110746.

It is an arithmetic number, because the mean of its divisors is an integer number (272061110746).

Almost surely, 2^544122221491 is an apocalyptic number.

544122221491 is a deficient number, since it is larger than the sum of its proper divisors (1).

544122221491 is an equidigital number, since it uses as much as digits as its factorization.

544122221491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 37.

The spelling of 544122221491 in words is "five hundred forty-four billion, one hundred twenty-two million, two hundred twenty-one thousand, four hundred ninety-one".