257663742317356 has 24 divisors (see below), whose sum is σ = 471214839997440. Its totient is φ = 123158424082512.

The previous prime is 257663742317353. The next prime is 257663742317419. The reversal of 257663742317356 is 653713247366752.

It is a super-2 number, since 2×257663742317356² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 257663742317291 and 257663742317300.

It is not an unprimeable number, because it can be changed into a prime (257663742317353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15936640996 + ... + 15936657163.

It is an arithmetic number, because the mean of its divisors is an integer number (19633951666560).

Almost surely, 2^{257663742317356} is an apocalyptic number.

It is an amenable number.

257663742317356 is a deficient number, since it is larger than the sum of its proper divisors (213551097680084).

257663742317356 is a wasteful number, since it uses less digits than its factorization.

257663742317356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31873298253 (or 31873298251 counting only the distinct ones).

The product of its digits is 800150400, while the sum is 67.

The spelling of 257663742317356 in words is "two hundred fifty-seven trillion, six hundred sixty-three billion, seven hundred forty-two million, three hundred seventeen thousand, three hundred fifty-six".