1381256881325 has 12 divisors (see below), whose sum is σ = 1715237220768. Its totient is φ = 1103406351600.

The previous prime is 1381256881313. The next prime is 1381256881327. The reversal of 1381256881325 is 5231886521831.

It is not a de Polignac number, because 1381256881325 - 2²⁸ = 1380988445869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381256881327) 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 11 ways as a sum of consecutive naturals, for example, 39961217 + ... + 39995766.

It is an arithmetic number, because the mean of its divisors is an integer number (142936435064).

Almost surely, 2^{1381256881325} is an apocalyptic number.

It is an amenable number.

1381256881325 is a deficient number, since it is larger than the sum of its proper divisors (333980339443).

1381256881325 is an equidigital number, since it uses as much as digits as its factorization.

1381256881325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79957684 (or 79957679 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 53.

The spelling of 1381256881325 in words is "one trillion, three hundred eighty-one billion, two hundred fifty-six million, eight hundred eighty-one thousand, three hundred twenty-five".