61544141 has 2 divisors, whose sum is σ = 61544142. Its totient is φ = 61544140.

The previous prime is 61544129. The next prime is 61544143. The reversal of 61544141 is 14144516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40576900 + 20967241 = 6370^2 + 4579^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61544141 is a prime.

It is a Sophie Germain prime.

Together with 61544143, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61544141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61544143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30772070 + 30772071.

It is an arithmetic number, because the mean of its divisors is an integer number (30772071).

Almost surely, 2^61544141 is an apocalyptic number.

It is an amenable number.

61544141 is a deficient number, since it is larger than the sum of its proper divisors (1).

61544141 is an equidigital number, since it uses as much as digits as its factorization.

61544141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 61544141 is about 7845.0073932406. The cubic root of 61544141 is about 394.8167520463.

Adding to 61544141 its reverse (14144516), we get a palindrome (75688657).

The spelling of 61544141 in words is "sixty-one million, five hundred forty-four thousand, one hundred forty-one".