13638940485 has 32 divisors (see below), whose sum is σ = 22371406848. Its totient is φ = 7091335680.

The previous prime is 13638940477. The next prime is 13638940493. The reversal of 13638940485 is 58404983631.

It is an interprime number because it is at equal distance from previous prime (13638940477) and next prime (13638940493).

It is not a de Polignac number, because 13638940485 - 2³ = 13638940477 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 885964 + ... + 901226.

It is an arithmetic number, because the mean of its divisors is an integer number (699106464).

Almost surely, 2^13638940485 is an apocalyptic number.

13638940485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13638940485 is a deficient number, since it is larger than the sum of its proper divisors (8732466363).

13638940485 is a wasteful number, since it uses less digits than its factorization.

13638940485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16765.

The product of its (nonzero) digits is 2488320, while the sum is 51.

The spelling of 13638940485 in words is "thirteen billion, six hundred thirty-eight million, nine hundred forty thousand, four hundred eighty-five".