797756221584 has 405 divisors, whose sum is σ = 2691444282579. Its totient is φ = 220577757120.

The previous prime is 797756221573. The next prime is 797756221589. The reversal of 797756221584 is 485122657797.

The square root of 797756221584 is 893172.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (797756221589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 25734071649 + ... + 25734071679.

Almost surely, 2^797756221584 is an apocalyptic number.

797756221584 is the 893172-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 797756221584

797756221584 is an abundant number, since it is smaller than the sum of its proper divisors (1893688060995).

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

797756221584 is an frugal number, since it uses more digits than its factorization.

797756221584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 43 counting only the distinct ones).

The product of its digits is 59270400, while the sum is 63.

The spelling of 797756221584 in words is "seven hundred ninety-seven billion, seven hundred fifty-six million, two hundred twenty-one thousand, five hundred eighty-four".