1361831178409 has 8 divisors (see below), whose sum is σ = 1552857271560. Its totient is φ = 1183129349376.

The previous prime is 1361831178353. The next prime is 1361831178457. The reversal of 1361831178409 is 9048711381631.

It can be written as a sum of positive squares in 4 ways, for example, as 254548502784 + 1107282675625 = 504528^2 + 1052275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1361831178409 - 2¹¹ = 1361831176361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1361831179409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3081065794 + ... + 3081066235.

It is an arithmetic number, because the mean of its divisors is an integer number (194107158945).

Almost surely, 2^{1361831178409} is an apocalyptic number.

It is an amenable number.

1361831178409 is a deficient number, since it is larger than the sum of its proper divisors (191026093151).

1361831178409 is a wasteful number, since it uses less digits than its factorization.

1361831178409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6162132059.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 1361831178409 in words is "one trillion, three hundred sixty-one billion, eight hundred thirty-one million, one hundred seventy-eight thousand, four hundred nine".