57517720669 has 2 divisors, whose sum is σ = 57517720670. Its totient is φ = 57517720668.

The previous prime is 57517720651. The next prime is 57517720781. The reversal of 57517720669 is 96602771575.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41559715044 + 15958005625 = 203862^2 + 126325^2 .

It is a cyclic number.

It is not a de Polignac number, because 57517720669 - 2²⁵ = 57484166237 is a prime.

It is a super-2 number, since 2×57517720669² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57517720609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28758860334 + 28758860335.

It is an arithmetic number, because the mean of its divisors is an integer number (28758860335).

Almost surely, 2^57517720669 is an apocalyptic number.

It is an amenable number.

57517720669 is a deficient number, since it is larger than the sum of its proper divisors (1).

57517720669 is an equidigital number, since it uses as much as digits as its factorization.

57517720669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5556600, while the sum is 55.

The spelling of 57517720669 in words is "fifty-seven billion, five hundred seventeen million, seven hundred twenty thousand, six hundred sixty-nine".