13172738727181 has 16 divisors (see below), whose sum is σ = 14996571712128. Its totient is φ = 11453396328000.

The previous prime is 13172738727157. The next prime is 13172738727287. The reversal of 13172738727181 is 18172783727131.

It is a de Polignac number, because none of the positive numbers 2^k-13172738727181 is a prime.

It is a super-4 number, since 4×13172738727181⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13172738727581) 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 15 ways as a sum of consecutive naturals, for example, 124386 + ... + 5134291.

It is an arithmetic number, because the mean of its divisors is an integer number (937285732008).

Almost surely, 2^{13172738727181} is an apocalyptic number.

13172738727181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13172738727181 is a deficient number, since it is larger than the sum of its proper divisors (1823832984947).

13172738727181 is a wasteful number, since it uses less digits than its factorization.

13172738727181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5268612.

The product of its digits is 5531904, while the sum is 58.

The spelling of 13172738727181 in words is "thirteen trillion, one hundred seventy-two billion, seven hundred thirty-eight million, seven hundred twenty-seven thousand, one hundred eighty-one".