13731072800781 has 32 divisors (see below), whose sum is σ = 21371281920000. Its totient is φ = 7678463921856.

The previous prime is 13731072800761. The next prime is 13731072800833. The reversal of 13731072800781 is 18700827013731.

It is not a de Polignac number, because 13731072800781 - 2¹⁷ = 13731072669709 is a prime.

It is a super-2 number, since 2×13731072800781² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13731072800781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13731072800761) 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 31 ways as a sum of consecutive naturals, for example, 7448595 + ... + 9107343.

It is an arithmetic number, because the mean of its divisors is an integer number (667852560000).

Almost surely, 2^{13731072800781} is an apocalyptic number.

It is an amenable number.

13731072800781 is a deficient number, since it is larger than the sum of its proper divisors (7640209119219).

13731072800781 is a wasteful number, since it uses less digits than its factorization.

13731072800781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667193.

The product of its (nonzero) digits is 395136, while the sum is 48.

The spelling of 13731072800781 in words is "thirteen trillion, seven hundred thirty-one billion, seventy-two million, eight hundred thousand, seven hundred eighty-one".