997176443328 has 840 divisors, whose sum is σ = 3377833547088. Its totient is φ = 289087045632.

The previous prime is 997176443323. The next prime is 997176443353. The reversal of 997176443328 is 823344671799.

997176443328 is a `hidden beast` number, since 9 + 9 + 7 + 176 + 4 + 433 + 28 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997176443323) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2958980376 + ... + 2958980712.

Almost surely, 2^997176443328 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 997176443328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1688916773544).

997176443328 is an abundant number, since it is smaller than the sum of its proper divisors (2380657103760).

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

997176443328 is a wasteful number, since it uses less digits than its factorization.

997176443328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 461 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 63.

The spelling of 997176443328 in words is "nine hundred ninety-seven billion, one hundred seventy-six million, four hundred forty-three thousand, three hundred twenty-eight".