61842364904609 has 2 divisors, whose sum is σ = 61842364904610. Its totient is φ = 61842364904608.

The previous prime is 61842364904581. The next prime is 61842364904623. The reversal of 61842364904609 is 90640946324816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61549281262225 + 293083642384 = 7845335^2 + 541372^2 .

It is a cyclic number.

It is not a de Polignac number, because 61842364904609 - 2³² = 61838069937313 is a prime.

It is not a weakly prime, because it can be changed into another prime (61842364904699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30921182452304 + 30921182452305.

It is an arithmetic number, because the mean of its divisors is an integer number (30921182452305).

Almost surely, 2^{61842364904609} is an apocalyptic number.

It is an amenable number.

61842364904609 is a deficient number, since it is larger than the sum of its proper divisors (1).

61842364904609 is an equidigital number, since it uses as much as digits as its factorization.

61842364904609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53747712, while the sum is 62.

The spelling of 61842364904609 in words is "sixty-one trillion, eight hundred forty-two billion, three hundred sixty-four million, nine hundred four thousand, six hundred nine".