13549385640 has 128 divisors (see below), whose sum is σ = 48900096000. Its totient is φ = 2933998848.

The previous prime is 13549385639. The next prime is 13549385651. The reversal of 13549385640 is 4658394531.

It is a self number, because there is not a number n which added to its sum of digits gives 13549385640.

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, 408520 + ... + 440439.

It is an arithmetic number, because the mean of its divisors is an integer number (382032000).

Almost surely, 2^13549385640 is an apocalyptic number.

13549385640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13549385640 is an abundant number, since it is smaller than the sum of its proper divisors (35350710360).

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

13549385640 is a wasteful number, since it uses less digits than its factorization.

13549385640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848999 (or 848995 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 13549385640 in words is "thirteen billion, five hundred forty-nine million, three hundred eighty-five thousand, six hundred forty".