1381368775 has 24 divisors (see below), whose sum is σ = 1757387520. Its totient is φ = 1076609760.

The previous prime is 1381368763. The next prime is 1381368797. The reversal of 1381368775 is 5778631831.

It is a de Polignac number, because none of the positive numbers 2^k-1381368775 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264136 + ... + 269314.

It is an arithmetic number, because the mean of its divisors is an integer number (73224480).

Almost surely, 2^1381368775 is an apocalyptic number.

1381368775 is a deficient number, since it is larger than the sum of its proper divisors (376018745).

1381368775 is a wasteful number, since it uses less digits than its factorization.

1381368775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5463 (or 5458 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The square root of 1381368775 is about 37166.7697681679. The cubic root of 1381368775 is about 1113.7042533347.

The spelling of 1381368775 in words is "one billion, three hundred eighty-one million, three hundred sixty-eight thousand, seven hundred seventy-five".