1797323978320 has 160 divisors (see below), whose sum is σ = 4546910229120. Its totient is φ = 656777963520.

The previous prime is 1797323978309. The next prime is 1797323978327. The reversal of 1797323978320 is 238793237971.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1797323978327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39256882 + ... + 39302638.

It is an arithmetic number, because the mean of its divisors is an integer number (28418188932).

Almost surely, 2^{1797323978320} is an apocalyptic number.

1797323978320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1797323978320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2273455114560).

1797323978320 is an abundant number, since it is smaller than the sum of its proper divisors (2749586250800).

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

1797323978320 is a wasteful number, since it uses less digits than its factorization.

1797323978320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46173 (or 46167 counting only the distinct ones).

The product of its (nonzero) digits is 24004512, while the sum is 61.

The spelling of 1797323978320 in words is "one trillion, seven hundred ninety-seven billion, three hundred twenty-three million, nine hundred seventy-eight thousand, three hundred twenty".