13440438137078 has 32 divisors (see below), whose sum is σ = 20703136923648. Its totient is φ = 6540988381600.

The previous prime is 13440438137069. The next prime is 13440438137083. The reversal of 13440438137078 is 87073183404431.

It is a super-3 number, since 3×13440438137078³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65915063 + ... + 66118653.

It is an arithmetic number, because the mean of its divisors is an integer number (646973028864).

Almost surely, 2^{13440438137078} is an apocalyptic number.

13440438137078 is a deficient number, since it is larger than the sum of its proper divisors (7262698786570).

13440438137078 is a wasteful number, since it uses less digits than its factorization.

13440438137078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207508.

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 13440438137078 in words is "thirteen trillion, four hundred forty billion, four hundred thirty-eight million, one hundred thirty-seven thousand, seventy-eight".