268628520449 has 2 divisors, whose sum is σ = 268628520450. Its totient is φ = 268628520448.

The previous prime is 268628520431. The next prime is 268628520481. The reversal of 268628520449 is 944025826862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 234262776049 + 34365744400 = 484007^2 + 185380^2 .

It is a cyclic number.

It is not a de Polignac number, because 268628520449 - 2²⁰ = 268627471873 is a prime.

It is a super-2 number, since 2×268628520449² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 268628520394 and 268628520403.

It is not a weakly prime, because it can be changed into another prime (268628520409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134314260224 + 134314260225.

It is an arithmetic number, because the mean of its divisors is an integer number (134314260225).

Almost surely, 2^268628520449 is an apocalyptic number.

It is an amenable number.

268628520449 is a deficient number, since it is larger than the sum of its proper divisors (1).

268628520449 is an equidigital number, since it uses as much as digits as its factorization.

268628520449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13271040, while the sum is 56.

The spelling of 268628520449 in words is "two hundred sixty-eight billion, six hundred twenty-eight million, five hundred twenty thousand, four hundred forty-nine".