1381319389377 has 6 divisors (see below), whose sum is σ = 1995239118002. Its totient is φ = 920879592912.

The previous prime is 1381319389361. The next prime is 1381319389391. The reversal of 1381319389377 is 7739839131831.

1381319389377 is a `hidden beast` number, since 138 + 1 + 319 + 38 + 93 + 77 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1380944618496 + 374770881 = 1175136^2 + 19359^2 .

It is not a de Polignac number, because 1381319389377 - 2⁴ = 1381319389361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381319889377) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76739966068 + ... + 76739966085.

Almost surely, 2^{1381319389377} is an apocalyptic number.

It is an amenable number.

1381319389377 is a deficient number, since it is larger than the sum of its proper divisors (613919728625).

1381319389377 is a wasteful number, since it uses less digits than its factorization.

1381319389377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153479932159 (or 153479932156 counting only the distinct ones).

The product of its digits is 20575296, while the sum is 63.

The spelling of 1381319389377 in words is "one trillion, three hundred eighty-one billion, three hundred nineteen million, three hundred eighty-nine thousand, three hundred seventy-seven".