13638605028 has 24 divisors (see below), whose sum is σ = 33695377632. Its totient is φ = 4278777984.

The previous prime is 13638605009. The next prime is 13638605047. The reversal of 13638605028 is 82050683631.

13638605028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13638605009) and next prime (13638605047).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33427750 + ... + 33428157.

It is an arithmetic number, because the mean of its divisors is an integer number (1403974068).

Almost surely, 2^13638605028 is an apocalyptic number.

It is an amenable number.

13638605028 is an abundant number, since it is smaller than the sum of its proper divisors (20056772604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13638605028 is a wasteful number, since it uses less digits than its factorization.

13638605028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66855931 (or 66855929 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 13638605028 in words is "thirteen billion, six hundred thirty-eight million, six hundred five thousand, twenty-eight".