57378666717 has 6 divisors (see below), whose sum is σ = 82880296382. Its totient is φ = 38252444472.

The previous prime is 57378666691. The next prime is 57378666731. The reversal of 57378666717 is 71766687375.

It can be written as a sum of positive squares in only one way, i.e., 40475806596 + 16902860121 = 201186^2 + 130011^2 .

It is not a de Polignac number, because 57378666717 - 2⁸ = 57378666461 is a prime.

It is a super-2 number, since 2×57378666717² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57378666767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3187703698 + ... + 3187703715.

Almost surely, 2^57378666717 is an apocalyptic number.

It is an amenable number.

57378666717 is a deficient number, since it is larger than the sum of its proper divisors (25501629665).

57378666717 is a wasteful number, since it uses less digits than its factorization.

57378666717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6375407419 (or 6375407416 counting only the distinct ones).

The product of its digits is 62233920, while the sum is 63.

The spelling of 57378666717 in words is "fifty-seven billion, three hundred seventy-eight million, six hundred sixty-six thousand, seven hundred seventeen".