57365736251521 has 2 divisors, whose sum is σ = 57365736251522. Its totient is φ = 57365736251520.

The previous prime is 57365736251513. The next prime is 57365736251533. The reversal of 57365736251521 is 12515263756375.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54083316306496 + 3282419945025 = 7354136^2 + 1811745^2 .

It is a cyclic number.

It is not a de Polignac number, because 57365736251521 - 2³ = 57365736251513 is a prime.

It is not a weakly prime, because it can be changed into another prime (57365736251501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28682868125760 + 28682868125761.

It is an arithmetic number, because the mean of its divisors is an integer number (28682868125761).

Almost surely, 2^{57365736251521} is an apocalyptic number.

It is an amenable number.

57365736251521 is a deficient number, since it is larger than the sum of its proper divisors (1).

57365736251521 is an equidigital number, since it uses as much as digits as its factorization.

57365736251521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690000, while the sum is 58.

The spelling of 57365736251521 in words is "fifty-seven trillion, three hundred sixty-five billion, seven hundred thirty-six million, two hundred fifty-one thousand, five hundred twenty-one".