61248442109 has 2 divisors, whose sum is σ = 61248442110. Its totient is φ = 61248442108.

The previous prime is 61248442051. The next prime is 61248442153. The reversal of 61248442109 is 90124484216.

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., 55861322500 + 5387119609 = 236350^2 + 73397^2 .

It is a cyclic number.

It is not a de Polignac number, because 61248442109 - 2²⁸ = 60980006653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61248442609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30624221054 + 30624221055.

It is an arithmetic number, because the mean of its divisors is an integer number (30624221055).

Almost surely, 2^61248442109 is an apocalyptic number.

It is an amenable number.

61248442109 is a deficient number, since it is larger than the sum of its proper divisors (1).

61248442109 is an equidigital number, since it uses as much as digits as its factorization.

61248442109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 61248442109 in words is "sixty-one billion, two hundred forty-eight million, four hundred forty-two thousand, one hundred nine".