997289529600 has 864 divisors, whose sum is σ = 4062899680000. Its totient is φ = 209788600320.

The previous prime is 997289529589. The next prime is 997289529601. The reversal of 997289529600 is 6925982799.

It is not an unprimeable number, because it can be changed into a prime (997289529601) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 798469776 + ... + 798471024.

Almost surely, 2^997289529600 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 997289529600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2031449840000).

997289529600 is an abundant number, since it is smaller than the sum of its proper divisors (3065610150400).

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

997289529600 is a wasteful number, since it uses less digits than its factorization.

997289529600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755 (or 1736 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 66.

The spelling of 997289529600 in words is "nine hundred ninety-seven billion, two hundred eighty-nine million, five hundred twenty-nine thousand, six hundred".