1068368521521 has 24 divisors (see below), whose sum is σ = 1643063225664. Its totient is φ = 604895273280.

The previous prime is 1068368521511. The next prime is 1068368521613. The reversal of 1068368521521 is 1251258638601.

It is not a de Polignac number, because 1068368521521 - 2⁵ = 1068368521489 is a prime.

It is a super-2 number, since 2×1068368521521² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1068368521511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1891510 + ... + 2390511.

It is an arithmetic number, because the mean of its divisors is an integer number (68460967736).

Almost surely, 2^{1068368521521} is an apocalyptic number.

It is an amenable number.

1068368521521 is a deficient number, since it is larger than the sum of its proper divisors (574694704143).

1068368521521 is an equidigital number, since it uses as much as digits as its factorization.

1068368521521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4282249 (or 4282140 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 48.

The spelling of 1068368521521 in words is "one trillion, sixty-eight billion, three hundred sixty-eight million, five hundred twenty-one thousand, five hundred twenty-one".