1381338032556 has 48 divisors (see below), whose sum is σ = 3298903977600. Its totient is φ = 449625386112.

The previous prime is 1381338032551. The next prime is 1381338032609. The reversal of 1381338032556 is 6552308331831.

It is not an unprimeable number, because it can be changed into a prime (1381338032551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1740760 + ... + 2406848.

It is an arithmetic number, because the mean of its divisors is an integer number (68727166200).

Almost surely, 2^{1381338032556} is an apocalyptic number.

It is an amenable number.

1381338032556 is an abundant number, since it is smaller than the sum of its proper divisors (1917565945044).

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

1381338032556 is a wasteful number, since it uses less digits than its factorization.

1381338032556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670158 (or 670156 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 1381338032556 in words is "one trillion, three hundred eighty-one billion, three hundred thirty-eight million, thirty-two thousand, five hundred fifty-six".