61780612481293 has 2 divisors, whose sum is σ = 61780612481294. Its totient is φ = 61780612481292.

The previous prime is 61780612481267. The next prime is 61780612481311. The reversal of 61780612481293 is 39218421608716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33399187315209 + 28381425166084 = 5779203^2 + 5327422^2 .

It is a cyclic number.

It is not a de Polignac number, because 61780612481293 - 2¹⁷ = 61780612350221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61780612481213) 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, 30890306240646 + 30890306240647.

It is an arithmetic number, because the mean of its divisors is an integer number (30890306240647).

Almost surely, 2^{61780612481293} is an apocalyptic number.

It is an amenable number.

61780612481293 is a deficient number, since it is larger than the sum of its proper divisors (1).

61780612481293 is an equidigital number, since it uses as much as digits as its factorization.

61780612481293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 61780612481293 in words is "sixty-one trillion, seven hundred eighty billion, six hundred twelve million, four hundred eighty-one thousand, two hundred ninety-three".