13581614049381 has 24 divisors (see below), whose sum is σ = 23739291785664. Its totient is φ = 7304397471360.

The previous prime is 13581614049343. The next prime is 13581614049391. The reversal of 13581614049381 is 18394041618531.

13581614049381 is a `hidden beast` number, since 1 + 3 + 5 + 8 + 1 + 6 + 140 + 493 + 8 + 1 = 666.

It is not a de Polignac number, because 13581614049381 - 2¹⁵ = 13581614016613 is a prime.

It is a super-2 number, since 2×13581614049381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13581614049391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6340621735 + ... + 6340623876.

It is an arithmetic number, because the mean of its divisors is an integer number (989137157736).

Almost surely, 2^{13581614049381} is an apocalyptic number.

It is an amenable number.

13581614049381 is a deficient number, since it is larger than the sum of its proper divisors (10157677736283).

13581614049381 is a wasteful number, since it uses less digits than its factorization.

13581614049381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12681245641 (or 12681245638 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 13581614049381 in words is "thirteen trillion, five hundred eighty-one billion, six hundred fourteen million, forty-nine thousand, three hundred eighty-one".