61500055605673 has 2 divisors, whose sum is σ = 61500055605674. Its totient is φ = 61500055605672.

The previous prime is 61500055605647. The next prime is 61500055605679. The reversal of 61500055605673 is 37650655000516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51207591778704 + 10292463826969 = 7155948^2 + 3208187^2 .

It is a cyclic number.

It is not a de Polignac number, because 61500055605673 - 2⁹ = 61500055605161 is a prime.

It is not a weakly prime, because it can be changed into another prime (61500055605679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30750027802836 + 30750027802837.

It is an arithmetic number, because the mean of its divisors is an integer number (30750027802837).

Almost surely, 2^{61500055605673} is an apocalyptic number.

It is an amenable number.

61500055605673 is a deficient number, since it is larger than the sum of its proper divisors (1).

61500055605673 is an equidigital number, since it uses as much as digits as its factorization.

61500055605673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2835000, while the sum is 49.

The spelling of 61500055605673 in words is "sixty-one trillion, five hundred billion, fifty-five million, six hundred five thousand, six hundred seventy-three".