1361205554463 has 24 divisors (see below), whose sum is σ = 1995039159360. Its totient is φ = 894177377280.

The previous prime is 1361205554453. The next prime is 1361205554509. The reversal of 1361205554463 is 3644555021631.

It is a happy number.

1361205554463 is a `hidden beast` number, since 1 + 36 + 1 + 2 + 0 + 5 + 554 + 4 + 63 = 666.

It is not a de Polignac number, because 1361205554463 - 2¹⁰ = 1361205553439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361205554413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 314418 + ... + 1679663.

It is an arithmetic number, because the mean of its divisors is an integer number (83126631640).

Almost surely, 2^{1361205554463} is an apocalyptic number.

1361205554463 is a deficient number, since it is larger than the sum of its proper divisors (633833604897).

1361205554463 is a wasteful number, since it uses less digits than its factorization.

1361205554463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1995199 (or 1995196 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 45.

The spelling of 1361205554463 in words is "one trillion, three hundred sixty-one billion, two hundred five million, five hundred fifty-four thousand, four hundred sixty-three".