1381317928157 has 2 divisors, whose sum is σ = 1381317928158. Its totient is φ = 1381317928156.

The previous prime is 1381317928147. The next prime is 1381317928169. The reversal of 1381317928157 is 7518297131831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1124817209476 + 256500718681 = 1060574^2 + 506459^2 .

It is an emirp because it is prime and its reverse (7518297131831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1381317928157 - 2³² = 1377022960861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381317928117) by changing a digit.

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 as a sum of consecutive naturals, namely, 690658964078 + 690658964079.

It is an arithmetic number, because the mean of its divisors is an integer number (690658964079).

Almost surely, 2^{1381317928157} is an apocalyptic number.

It is an amenable number.

1381317928157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381317928157 is an equidigital number, since it uses as much as digits as its factorization.

1381317928157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 56.

The spelling of 1381317928157 in words is "one trillion, three hundred eighty-one billion, three hundred seventeen million, nine hundred twenty-eight thousand, one hundred fifty-seven".