997202425856 has 384 divisors, whose sum is σ = 2496568314240. Its totient is φ = 387740860416.

The previous prime is 997202425789. The next prime is 997202425907. The reversal of 997202425856 is 658524202799.

It is a junction number, because it is equal to n+sod(n) for n = 997202425795 and 997202425804.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5061941150 + ... + 5061941346.

It is an arithmetic number, because the mean of its divisors is an integer number (6501479985).

Almost surely, 2^997202425856 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 997202425856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1248284157120).

997202425856 is an abundant number, since it is smaller than the sum of its proper divisors (1499365888384).

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

997202425856 is a wasteful number, since it uses less digits than its factorization.

997202425856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 59.

The spelling of 997202425856 in words is "nine hundred ninety-seven billion, two hundred two million, four hundred twenty-five thousand, eight hundred fifty-six".