13390844538 has 16 divisors (see below), whose sum is σ = 26806250016. Its totient is φ = 4459521360.

The previous prime is 13390844507. The next prime is 13390844543. The reversal of 13390844538 is 83544809331.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016281 + ... + 1029372.

It is an arithmetic number, because the mean of its divisors is an integer number (1675390626).

Almost surely, 2^13390844538 is an apocalyptic number.

13390844538 is an abundant number, since it is smaller than the sum of its proper divisors (13415405478).

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

13390844538 is a wasteful number, since it uses less digits than its factorization.

13390844538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2046749.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 13390844538 in words is "thirteen billion, three hundred ninety million, eight hundred forty-four thousand, five hundred thirty-eight".