997597444804 has 27 divisors (see below), whose sum is σ = 1825083917293. Its totient is φ = 477089847872.

The previous prime is 997597444801. The next prime is 997597444861. The reversal of 997597444804 is 408444795799.

The square root of 997597444804 is 998798.

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

It can be written as a sum of positive squares in only one way, i.e., 258602760900 + 738994683904 = 508530^2 + 859648^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997597444801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 45933852 + ... + 45955564.

Almost surely, 2^997597444804 is an apocalyptic number.

997597444804 is the 998798-th square number.

It is an amenable number.

997597444804 is a deficient number, since it is larger than the sum of its proper divisors (827486472489).

997597444804 is an frugal number, since it uses more digits than its factorization.

997597444804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43476 (or 21738 counting only the distinct ones).

The product of its (nonzero) digits is 365783040, while the sum is 70.

It can be divided in two parts, 997597 and 444804, that added together give a square (1442401 = 1201²).

The spelling of 997597444804 in words is "nine hundred ninety-seven billion, five hundred ninety-seven million, four hundred forty-four thousand, eight hundred four".