61028045489 has 2 divisors, whose sum is σ = 61028045490. Its totient is φ = 61028045488.

The previous prime is 61028045471. The next prime is 61028045503. The reversal of 61028045489 is 98454082016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48914841889 + 12113203600 = 221167^2 + 110060^2 .

It is a cyclic number.

It is not a de Polignac number, because 61028045489 - 2²⁰ = 61026996913 is a prime.

It is not a weakly prime, because it can be changed into another prime (61028041489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30514022744 + 30514022745.

It is an arithmetic number, because the mean of its divisors is an integer number (30514022745).

Almost surely, 2^61028045489 is an apocalyptic number.

It is an amenable number.

61028045489 is a deficient number, since it is larger than the sum of its proper divisors (1).

61028045489 is an equidigital number, since it uses as much as digits as its factorization.

61028045489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 61028045489 in words is "sixty-one billion, twenty-eight million, forty-five thousand, four hundred eighty-nine".