13726639840 has 24 divisors (see below), whose sum is σ = 32429187000. Its totient is φ = 5490655872.

The previous prime is 13726639837. The next prime is 13726639859. The reversal of 13726639840 is 4893662731.

13726639840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 42895590 + ... + 42895909.

It is an arithmetic number, because the mean of its divisors is an integer number (1351216125).

Almost surely, 2^13726639840 is an apocalyptic number.

13726639840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13726639840 is an abundant number, since it is smaller than the sum of its proper divisors (18702547160).

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

13726639840 is an equidigital number, since it uses as much as digits as its factorization.

13726639840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85791514 (or 85791506 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 13726639840 in words is "thirteen billion, seven hundred twenty-six million, six hundred thirty-nine thousand, eight hundred forty".