1172340438318 has 128 divisors (see below), whose sum is σ = 3157838576640. Its totient is φ = 314718566400.

The previous prime is 1172340438253. The next prime is 1172340438319. The reversal of 1172340438318 is 8138340432711.

1172340438318 is a `hidden beast` number, since 1 + 172 + 3 + 40 + 438 + 3 + 1 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172340438319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3656793 + ... + 3964443.

It is an arithmetic number, because the mean of its divisors is an integer number (24670613880).

Almost surely, 2^{1172340438318} is an apocalyptic number.

1172340438318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1172340438318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578919288320).

1172340438318 is an abundant number, since it is smaller than the sum of its proper divisors (1985498138322).

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

1172340438318 is a wasteful number, since it uses less digits than its factorization.

1172340438318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308279 (or 308273 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 1172340438318 in words is "one trillion, one hundred seventy-two billion, three hundred forty million, four hundred thirty-eight thousand, three hundred eighteen".