997220573424 has 280 divisors, whose sum is σ = 2942494592400. Its totient is φ = 327207859200.

The previous prime is 997220573417. The next prime is 997220573429. The reversal of 997220573424 is 424375022799.

It is a happy number.

997220573424 is a `hidden beast` number, since 9 + 9 + 7 + 2 + 20 + 573 + 42 + 4 = 666.

997220573424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997220573429) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 210871092 + ... + 210875820.

Almost surely, 2^997220573424 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 997220573424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1471247296200).

997220573424 is an abundant number, since it is smaller than the sum of its proper divisors (1945274018976).

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

997220573424 is a wasteful number, since it uses less digits than its factorization.

997220573424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035 (or 5014 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 54.

The spelling of 997220573424 in words is "nine hundred ninety-seven billion, two hundred twenty million, five hundred seventy-three thousand, four hundred twenty-four".