997358387200 has 720 divisors, whose sum is σ = 2990447488000. Its totient is φ = 329475686400.

The previous prime is 997358387189. The next prime is 997358387209. The reversal of 997358387200 is 2783853799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997358387209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4355276686 + ... + 4355276914.

Almost surely, 2^997358387200 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 997358387200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1495223744000).

997358387200 is an abundant number, since it is smaller than the sum of its proper divisors (1993089100800).

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

997358387200 is an equidigital number, since it uses as much as digits as its factorization.

997358387200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 997358387200 in words is "nine hundred ninety-seven billion, three hundred fifty-eight million, three hundred eighty-seven thousand, two hundred".