57781218743 has 2 divisors, whose sum is σ = 57781218744. Its totient is φ = 57781218742.

The previous prime is 57781218709. The next prime is 57781218797. The reversal of 57781218743 is 34781218775.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57781218743 - 2⁸ = 57781218487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57781211743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28890609371 + 28890609372.

It is an arithmetic number, because the mean of its divisors is an integer number (28890609372).

Almost surely, 2^57781218743 is an apocalyptic number.

57781218743 is a deficient number, since it is larger than the sum of its proper divisors (1).

57781218743 is an equidigital number, since it uses as much as digits as its factorization.

57781218743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2634240, while the sum is 53.

The spelling of 57781218743 in words is "fifty-seven billion, seven hundred eighty-one million, two hundred eighteen thousand, seven hundred forty-three".