13887920319577 has 4 divisors (see below), whose sum is σ = 13903577502336. Its totient is φ = 13872263136820.

The previous prime is 13887920319569. The next prime is 13887920319583. The reversal of 13887920319577 is 77591302978831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13887920319577 - 2³ = 13887920319569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13887920319877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7828590049 + ... + 7828591822.

It is an arithmetic number, because the mean of its divisors is an integer number (3475894375584).

Almost surely, 2^{13887920319577} is an apocalyptic number.

It is an amenable number.

13887920319577 is a deficient number, since it is larger than the sum of its proper divisors (15657182759).

13887920319577 is an equidigital number, since it uses as much as digits as its factorization.

13887920319577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15657182758.

The product of its (nonzero) digits is 160030080, while the sum is 70.

The spelling of 13887920319577 in words is "thirteen trillion, eight hundred eighty-seven billion, nine hundred twenty million, three hundred nineteen thousand, five hundred seventy-seven".