368672168521 has 2 divisors, whose sum is σ = 368672168522. Its totient is φ = 368672168520.

The previous prime is 368672168497. The next prime is 368672168563. The reversal of 368672168521 is 125861276863.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199997678521 + 168674490000 = 447211^2 + 410700^2 .

It is a cyclic number.

It is not a de Polignac number, because 368672168521 - 2¹⁹ = 368671644233 is a prime.

It is not a weakly prime, because it can be changed into another prime (368672168581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184336084260 + 184336084261.

It is an arithmetic number, because the mean of its divisors is an integer number (184336084261).

Almost surely, 2^368672168521 is an apocalyptic number.

It is an amenable number.

368672168521 is a deficient number, since it is larger than the sum of its proper divisors (1).

368672168521 is an equidigital number, since it uses as much as digits as its factorization.

368672168521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5806080, while the sum is 55.

The spelling of 368672168521 in words is "three hundred sixty-eight billion, six hundred seventy-two million, one hundred sixty-eight thousand, five hundred twenty-one".