57791396749 has 2 divisors, whose sum is σ = 57791396750. Its totient is φ = 57791396748.

The previous prime is 57791396731. The next prime is 57791396801. The reversal of 57791396749 is 94769319775.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43225320649 + 14566076100 = 207907^2 + 120690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57791396749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57791396449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28895698374 + 28895698375.

It is an arithmetic number, because the mean of its divisors is an integer number (28895698375).

Almost surely, 2^57791396749 is an apocalyptic number.

It is an amenable number.

57791396749 is a deficient number, since it is larger than the sum of its proper divisors (1).

57791396749 is an equidigital number, since it uses as much as digits as its factorization.

57791396749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90016920, while the sum is 67.

The spelling of 57791396749 in words is "fifty-seven billion, seven hundred ninety-one million, three hundred ninety-six thousand, seven hundred forty-nine".