544449772261 has 2 divisors, whose sum is σ = 544449772262. Its totient is φ = 544449772260.

The previous prime is 544449772199. The next prime is 544449772301. The reversal of 544449772261 is 162277944445.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 542299688100 + 2150084161 = 736410^2 + 46369^2 .

It is a cyclic number.

It is not a de Polignac number, because 544449772261 - 2¹⁷ = 544449641189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (544449776261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272224886130 + 272224886131.

It is an arithmetic number, because the mean of its divisors is an integer number (272224886131).

Almost surely, 2^544449772261 is an apocalyptic number.

It is an amenable number.

544449772261 is a deficient number, since it is larger than the sum of its proper divisors (1).

544449772261 is an equidigital number, since it uses as much as digits as its factorization.

544449772261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13547520, while the sum is 55.

The spelling of 544449772261 in words is "five hundred forty-four billion, four hundred forty-nine million, seven hundred seventy-two thousand, two hundred sixty-one".