61365641 has 2 divisors, whose sum is σ = 61365642. Its totient is φ = 61365640.

The previous prime is 61365607. The next prime is 61365683. The reversal of 61365641 is 14656316.

61365641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56190016 + 5175625 = 7496^2 + 2275^2 .

It is a cyclic number.

It is not a de Polignac number, because 61365641 - 2¹⁰ = 61364617 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 61365598 and 61365607.

It is not a weakly prime, because it can be changed into another prime (61367641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30682820 + 30682821.

It is an arithmetic number, because the mean of its divisors is an integer number (30682821).

Almost surely, 2^61365641 is an apocalyptic number.

It is an amenable number.

61365641 is a deficient number, since it is larger than the sum of its proper divisors (1).

61365641 is an equidigital number, since it uses as much as digits as its factorization.

61365641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 61365641 is about 7833.6224698411. The cubic root of 61365641 is about 394.4346792060.

The spelling of 61365641 in words is "sixty-one million, three hundred sixty-five thousand, six hundred forty-one".