257135682668 has 6 divisors (see below), whose sum is σ = 449987444676. Its totient is φ = 128567841332.

The previous prime is 257135682667. The next prime is 257135682707. The reversal of 257135682668 is 866286531752.

257135682668 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×257135682668² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257135682667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32141960330 + ... + 32141960337.

It is an arithmetic number, because the mean of its divisors is an integer number (74997907446).

Almost surely, 2^257135682668 is an apocalyptic number.

It is an amenable number.

257135682668 is a deficient number, since it is larger than the sum of its proper divisors (192851762008).

257135682668 is a wasteful number, since it uses less digits than its factorization.

257135682668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64283920671 (or 64283920669 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 59.

The spelling of 257135682668 in words is "two hundred fifty-seven billion, one hundred thirty-five million, six hundred eighty-two thousand, six hundred sixty-eight".