13939388187577 has 4 divisors (see below), whose sum is σ = 13939695044980. Its totient is φ = 13939081330176.

The previous prime is 13939388187559. The next prime is 13939388187583. The reversal of 13939388187577 is 77578188393931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9498502097296 + 4440886090281 = 3081964^2 + 2107341^2 .

It is a cyclic number.

It is not a de Polignac number, because 13939388187577 - 2⁷ = 13939388187449 is a prime.

It is a super-2 number, since 2×13939388187577² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13939388187497 and 13939388187506.

It is not an unprimeable number, because it can be changed into a prime (13939388187547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153360552 + ... + 153451417.

It is an arithmetic number, because the mean of its divisors is an integer number (3484923761245).

Almost surely, 2^{13939388187577} is an apocalyptic number.

It is an amenable number.

13939388187577 is a deficient number, since it is larger than the sum of its proper divisors (306857403).

13939388187577 is an equidigital number, since it uses as much as digits as its factorization.

13939388187577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306857402.

The product of its digits is 1920360960, while the sum is 79.

The spelling of 13939388187577 in words is "thirteen trillion, nine hundred thirty-nine billion, three hundred eighty-eight million, one hundred eighty-seven thousand, five hundred seventy-seven".