61580381293 has 2 divisors, whose sum is σ = 61580381294. Its totient is φ = 61580381292.

The previous prime is 61580381251. The next prime is 61580381297. The reversal of 61580381293 is 39218308516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56835513604 + 4744867689 = 238402^2 + 68883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61580381293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61580381297) 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, 30790190646 + 30790190647.

It is an arithmetic number, because the mean of its divisors is an integer number (30790190647).

Almost surely, 2^61580381293 is an apocalyptic number.

It is an amenable number.

61580381293 is a deficient number, since it is larger than the sum of its proper divisors (1).

61580381293 is an equidigital number, since it uses as much as digits as its factorization.

61580381293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 61580381293 in words is "sixty-one billion, five hundred eighty million, three hundred eighty-one thousand, two hundred ninety-three".