1361373755544 has 192 divisors, whose sum is σ = 4057364507040. Its totient is φ = 408943687680.

The previous prime is 1361373755519. The next prime is 1361373755551. The reversal of 1361373755544 is 4455573731631.

1361373755544 is a `hidden beast` number, since 1 + 3 + 6 + 13 + 7 + 3 + 75 + 554 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79524874 + ... + 79541990.

Almost surely, 2^{1361373755544} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1361373755544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2028682253520).

1361373755544 is an abundant number, since it is smaller than the sum of its proper divisors (2695990751496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1361373755544 is a wasteful number, since it uses less digits than its factorization.

1361373755544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18010 (or 18003 counting only the distinct ones).

The product of its digits is 15876000, while the sum is 54.

The spelling of 1361373755544 in words is "one trillion, three hundred sixty-one billion, three hundred seventy-three million, seven hundred fifty-five thousand, five hundred forty-four".