61744573439 has 2 divisors, whose sum is σ = 61744573440. Its totient is φ = 61744573438.

The previous prime is 61744573421. The next prime is 61744573447. The reversal of 61744573439 is 93437544716.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61744573439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61744573039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30872286719 + 30872286720.

It is an arithmetic number, because the mean of its divisors is an integer number (30872286720).

Almost surely, 2^61744573439 is an apocalyptic number.

61744573439 is a deficient number, since it is larger than the sum of its proper divisors (1).

61744573439 is an equidigital number, since it uses as much as digits as its factorization.

61744573439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7620480, while the sum is 53.

The spelling of 61744573439 in words is "sixty-one billion, seven hundred forty-four million, five hundred seventy-three thousand, four hundred thirty-nine".