1068145681 has 4 divisors (see below), whose sum is σ = 1069632000. Its totient is φ = 1066659364.

The previous prime is 1068145669. The next prime is 1068145699. The reversal of 1068145681 is 1865418601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1865418601 = 36697 ⋅50833.

It is a cyclic number.

It is not a de Polignac number, because 1068145681 - 2¹¹ = 1068143633 is a prime.

It is a super-2 number, since 2×1068145681² = 2281870391677907522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1068145621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 742081 + ... + 743518.

It is an arithmetic number, because the mean of its divisors is an integer number (267408000).

Almost surely, 2^1068145681 is an apocalyptic number.

It is an amenable number.

1068145681 is a deficient number, since it is larger than the sum of its proper divisors (1486319).

1068145681 is an equidigital number, since it uses as much as digits as its factorization.

1068145681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486318.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 1068145681 is about 32682.4980838369. The cubic root of 1068145681 is about 1022.2179345235.

The spelling of 1068145681 in words is "one billion, sixty-eight million, one hundred forty-five thousand, six hundred eighty-one".