1381661365351 has 32 divisors (see below), whose sum is σ = 1468468235520. Its totient is φ = 1296345254400.

The previous prime is 1381661365349. The next prime is 1381661365361. The reversal of 1381661365351 is 1535631661831.

It is not a de Polignac number, because 1381661365351 - 2¹ = 1381661365349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1381661365295 and 1381661365304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381661365361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 828830220 + ... + 828831886.

It is an arithmetic number, because the mean of its divisors is an integer number (45889632360).

Almost surely, 2^{1381661365351} is an apocalyptic number.

1381661365351 is a deficient number, since it is larger than the sum of its proper divisors (86806870169).

1381661365351 is a wasteful number, since it uses less digits than its factorization.

1381661365351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815.

The product of its digits is 1166400, while the sum is 49.

The spelling of 1381661365351 in words is "one trillion, three hundred eighty-one billion, six hundred sixty-one million, three hundred sixty-five thousand, three hundred fifty-one".