1381317928156 has 6 divisors (see below), whose sum is σ = 2417306374280. Its totient is φ = 690658964076.

The previous prime is 1381317928147. The next prime is 1381317928157. The reversal of 1381317928156 is 6518297131831.

It is a junction number, because it is equal to n+sod(n) for n = 1381317928097 and 1381317928106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381317928157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172664741016 + ... + 172664741023.

Almost surely, 2^{1381317928156} is an apocalyptic number.

It is an amenable number.

1381317928156 is a deficient number, since it is larger than the sum of its proper divisors (1035988446124).

1381317928156 is a wasteful number, since it uses less digits than its factorization.

1381317928156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345329482043 (or 345329482041 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 55.

The spelling of 1381317928156 in words is "one trillion, three hundred eighty-one billion, three hundred seventeen million, nine hundred twenty-eight thousand, one hundred fifty-six".