1381569861604 has 27 divisors (see below), whose sum is σ = 2428893438307. Its totient is φ = 687614871608.

The previous prime is 1381569861563. The next prime is 1381569861643. The reversal of 1381569861604 is 4061689651831.

The square root of 1381569861604 is 1175402.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 561840927 + ... + 561843385.

Almost surely, 2^{1381569861604} is an apocalyptic number.

1381569861604 is the 1175402-nd square number.

It is an amenable number.

1381569861604 is a deficient number, since it is larger than the sum of its proper divisors (1047323576703).

1381569861604 is an frugal number, since it uses more digits than its factorization.

1381569861604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5400 (or 2700 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 58.

The spelling of 1381569861604 in words is "one trillion, three hundred eighty-one billion, five hundred sixty-nine million, eight hundred sixty-one thousand, six hundred four".