13438173663280 has 40 divisors (see below), whose sum is σ = 31280993200800. Its totient is φ = 5368862681088.

The previous prime is 13438173663263. The next prime is 13438173663283. The reversal of 13438173663280 is 8236637183431.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×13438173663280² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13438173663283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100038465 + ... + 100172704.

It is an arithmetic number, because the mean of its divisors is an integer number (782024830020).

Almost surely, 2^{13438173663280} is an apocalyptic number.

13438173663280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13438173663280 is an abundant number, since it is smaller than the sum of its proper divisors (17842819537520).

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

13438173663280 is a wasteful number, since it uses less digits than its factorization.

13438173663280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200212021 (or 200212015 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 55.

The spelling of 13438173663280 in words is "thirteen trillion, four hundred thirty-eight billion, one hundred seventy-three million, six hundred sixty-three thousand, two hundred eighty".