61540163 has 2 divisors, whose sum is σ = 61540164. Its totient is φ = 61540162.

The previous prime is 61540147. The next prime is 61540169. The reversal of 61540163 is 36104516.

61540163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61540163 - 2⁴ = 61540147 is a prime.

It is not a weakly prime, because it can be changed into another prime (61540169) 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, 30770081 + 30770082.

It is an arithmetic number, because the mean of its divisors is an integer number (30770082).

Almost surely, 2^61540163 is an apocalyptic number.

61540163 is a deficient number, since it is larger than the sum of its proper divisors (1).

61540163 is an equidigital number, since it uses as much as digits as its factorization.

61540163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 61540163 is about 7844.7538520976. The cubic root of 61540163 is about 394.8082453341.

Adding to 61540163 its reverse (36104516), we get a palindrome (97644679).

The spelling of 61540163 in words is "sixty-one million, five hundred forty thousand, one hundred sixty-three".