13172178408 has 96 divisors (see below), whose sum is σ = 35329707360. Its totient is φ = 4091315200.

The previous prime is 13172178389. The next prime is 13172178413. The reversal of 13172178408 is 80487127131.

It is a self number, because there is not a number n which added to its sum of digits gives 13172178408.

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 23 ways as a sum of consecutive naturals, for example, 691135 + ... + 709937.

It is an arithmetic number, because the mean of its divisors is an integer number (368017785).

Almost surely, 2^13172178408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13172178408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17664853680).

13172178408 is an abundant number, since it is smaller than the sum of its proper divisors (22157528952).

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

13172178408 is a wasteful number, since it uses less digits than its factorization.

13172178408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18947 (or 18926 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 42.

The spelling of 13172178408 in words is "thirteen billion, one hundred seventy-two million, one hundred seventy-eight thousand, four hundred eight".