13815882977 has 4 divisors (see below), whose sum is σ = 14878643220. Its totient is φ = 12753122736.

The previous prime is 13815882973. The next prime is 13815883001. The reversal of 13815882977 is 77928851831.

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 1573788241 + 12242094736 = 39671^2 + 110644^2 .

It is a cyclic number.

It is not a de Polignac number, because 13815882977 - 2² = 13815882973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13815882973) 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, 531380102 + ... + 531380127.

It is an arithmetic number, because the mean of its divisors is an integer number (3719660805).

Almost surely, 2^13815882977 is an apocalyptic number.

It is an amenable number.

13815882977 is a deficient number, since it is larger than the sum of its proper divisors (1062760243).

13815882977 is a wasteful number, since it uses less digits than its factorization.

13815882977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062760242.

The product of its digits is 6773760, while the sum is 59.

The spelling of 13815882977 in words is "thirteen billion, eight hundred fifteen million, eight hundred eighty-two thousand, nine hundred seventy-seven".