61580321293 has 2 divisors, whose sum is σ = 61580321294. Its totient is φ = 61580321292.

The previous prime is 61580321249. The next prime is 61580321323. The reversal of 61580321293 is 39212308516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61057421604 + 522899689 = 247098^2 + 22867^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61580321293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61580381293) 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, 30790160646 + 30790160647.

It is an arithmetic number, because the mean of its divisors is an integer number (30790160647).

Almost surely, 2^61580321293 is an apocalyptic number.

It is an amenable number.

61580321293 is a deficient number, since it is larger than the sum of its proper divisors (1).

61580321293 is an equidigital number, since it uses as much as digits as its factorization.

61580321293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The spelling of 61580321293 in words is "sixty-one billion, five hundred eighty million, three hundred twenty-one thousand, two hundred ninety-three".