13781866052019 has 8 divisors (see below), whose sum is σ = 19789346126032. Its totient is φ = 8481148339680.

The previous prime is 13781866051981. The next prime is 13781866052033. The reversal of 13781866052019 is 91025066818731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13781866052019 - 2²⁷ = 13781731834291 is a prime.

It is a super-2 number, since 2×13781866052019² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13781866052019.

It is not an unprimeable number, because it can be changed into a prime (13781866052089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176690590372 + ... + 176690590449.

It is an arithmetic number, because the mean of its divisors is an integer number (2473668265754).

Almost surely, 2^{13781866052019} is an apocalyptic number.

13781866052019 is a deficient number, since it is larger than the sum of its proper divisors (6007480074013).

13781866052019 is a wasteful number, since it uses less digits than its factorization.

13781866052019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353381180837.

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 13781866052019 in words is "thirteen trillion, seven hundred eighty-one billion, eight hundred sixty-six million, fifty-two thousand, nineteen".