1381066568 has 36 divisors (see below), whose sum is σ = 3013880985. Its totient is φ = 591570336.

The previous prime is 1381066543. The next prime is 1381066571. The reversal of 1381066568 is 8656601831.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 1358807044 + 22259524 = 36862^2 + 4718^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=26278.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 734846 + ... + 736722.

Almost surely, 2^1381066568 is an apocalyptic number.

It is an amenable number.

1381066568 is an abundant number, since it is smaller than the sum of its proper divisors (1632814417).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1381066568 is an frugal number, since it uses more digits than its factorization.

1381066568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3774 (or 1886 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 1381066568 is about 37162.7039920402. The cubic root of 1381066568 is about 1113.6230310537.

The spelling of 1381066568 in words is "one billion, three hundred eighty-one million, sixty-six thousand, five hundred sixty-eight".