61500055605073 has 2 divisors, whose sum is σ = 61500055605074. Its totient is φ = 61500055605072.

The previous prime is 61500055605031. The next prime is 61500055605089. The reversal of 61500055605073 is 37050655000516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47181952063744 + 14318103541329 = 6868912^2 + 3783927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61500055605073 is a prime.

It is not a weakly prime, because it can be changed into another prime (61500055605673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30750027802536 + 30750027802537.

It is an arithmetic number, because the mean of its divisors is an integer number (30750027802537).

Almost surely, 2^{61500055605073} is an apocalyptic number.

It is an amenable number.

61500055605073 is a deficient number, since it is larger than the sum of its proper divisors (1).

61500055605073 is an equidigital number, since it uses as much as digits as its factorization.

61500055605073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 472500, while the sum is 43.

The spelling of 61500055605073 in words is "sixty-one trillion, five hundred billion, fifty-five million, six hundred five thousand, seventy-three".