997909514448 has 960 divisors, whose sum is σ = 3574189332480. Its totient is φ = 232359321600.

The previous prime is 997909514443. The next prime is 997909514461. The reversal of 997909514448 is 844415909799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997909514443) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3602561286 + ... + 3602561562.

It is an arithmetic number, because the mean of its divisors is an integer number (3723113888).

Almost surely, 2^997909514448 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 997909514448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1787094666240).

997909514448 is an abundant number, since it is smaller than the sum of its proper divisors (2576279818032).

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

997909514448 is a wasteful number, since it uses less digits than its factorization.

997909514448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 69.

The spelling of 997909514448 in words is "nine hundred ninety-seven billion, nine hundred nine million, five hundred fourteen thousand, four hundred forty-eight".