997291826424 has 128 divisors (see below), whose sum is σ = 2918654400000. Its totient is φ = 314653849344.

The previous prime is 997291826383. The next prime is 997291826431. The reversal of 997291826424 is 424628192799.

997291826424 is a `hidden beast` number, since 9 + 9 + 7 + 29 + 182 + 6 + 424 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4525797 + ... + 4741035.

It is an arithmetic number, because the mean of its divisors is an integer number (22801987500).

Almost surely, 2^997291826424 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 997291826424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1459327200000).

997291826424 is an abundant number, since it is smaller than the sum of its proper divisors (1921362573576).

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

997291826424 is a wasteful number, since it uses less digits than its factorization.

997291826424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216402 (or 216392 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 63.

The spelling of 997291826424 in words is "nine hundred ninety-seven billion, two hundred ninety-one million, eight hundred twenty-six thousand, four hundred twenty-four".