13818531277 has 16 divisors (see below), whose sum is σ = 14840712432. Its totient is φ = 12819824640.

The previous prime is 13818531253. The next prime is 13818531281. The reversal of 13818531277 is 77213581831.

It can be written as a sum of positive squares in 8 ways, for example, as 763876 + 13817767401 = 874^2 + 117549^2 .

It is a cyclic number.

It is not a de Polignac number, because 13818531277 - 2⁷ = 13818531149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13818531677) 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 15 ways as a sum of consecutive naturals, for example, 3995533 + ... + 3998989.

It is an arithmetic number, because the mean of its divisors is an integer number (927544527).

Almost surely, 2^13818531277 is an apocalyptic number.

13818531277 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13818531277 is a deficient number, since it is larger than the sum of its proper divisors (1022181155).

13818531277 is a wasteful number, since it uses less digits than its factorization.

13818531277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768.

The product of its digits is 282240, while the sum is 46.

The spelling of 13818531277 in words is "thirteen billion, eight hundred eighteen million, five hundred thirty-one thousand, two hundred seventy-seven".