61144345441 has 2 divisors, whose sum is σ = 61144345442. Its totient is φ = 61144345440.

The previous prime is 61144345439. The next prime is 61144345447. The reversal of 61144345441 is 14454344116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42755900625 + 18388444816 = 206775^2 + 135604^2 .

It is a cyclic number.

It is not a de Polignac number, because 61144345441 - 2¹ = 61144345439 is a prime.

Together with 61144345439, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 61144345441.

It is not a weakly prime, because it can be changed into another prime (61144345447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30572172720 + 30572172721.

It is an arithmetic number, because the mean of its divisors is an integer number (30572172721).

Almost surely, 2^61144345441 is an apocalyptic number.

It is an amenable number.

61144345441 is a deficient number, since it is larger than the sum of its proper divisors (1).

61144345441 is an equidigital number, since it uses as much as digits as its factorization.

61144345441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 37.

Adding to 61144345441 its reverse (14454344116), we get a palindrome (75598689557).

The spelling of 61144345441 in words is "sixty-one billion, one hundred forty-four million, three hundred forty-five thousand, four hundred forty-one".