1381936611365 has 16 divisors (see below), whose sum is σ = 1704352581360. Its totient is φ = 1074905948160.

The previous prime is 1381936611337. The next prime is 1381936611373. The reversal of 1381936611365 is 5631166391831.

It is a Cunningham number, because it is equal to 1175558²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 17598144964 + 1364338466401 = 132658^2 + 1168049^2 .

It is not a de Polignac number, because 1381936611365 - 2³⁶ = 1313217134629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2390126 + ... + 2911455.

It is an arithmetic number, because the mean of its divisors is an integer number (106522036335).

Almost surely, 2^{1381936611365} is an apocalyptic number.

It is an amenable number.

1381936611365 is a deficient number, since it is larger than the sum of its proper divisors (322415969995).

1381936611365 is a wasteful number, since it uses less digits than its factorization.

1381936611365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5303032.

The product of its digits is 2099520, while the sum is 53.

The spelling of 1381936611365 in words is "one trillion, three hundred eighty-one billion, nine hundred thirty-six million, six hundred eleven thousand, three hundred sixty-five".