997345763584 has 27 divisors (see below), whose sum is σ = 1990827540877. Its totient is φ = 498664892416.

The previous prime is 997345763549. The next prime is 997345763683. The reversal of 997345763584 is 485367543799.

The square root of 997345763584 is 998672.

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., 7177478400 + 990168285184 = 84720^2 + 995072^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15947544 + ... + 16009960.

Almost surely, 2^997345763584 is an apocalyptic number.

997345763584 is the 998672-nd square number.

It is an amenable number.

997345763584 is a deficient number, since it is larger than the sum of its proper divisors (993481777293).

997345763584 is an frugal number, since it uses more digits than its factorization.

997345763584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124850 (or 62419 counting only the distinct ones).

The product of its digits is 685843200, while the sum is 70.

It can be divided in two parts, 997345 and 763584, that added together give a square (1760929 = 1327²).

The spelling of 997345763584 in words is "nine hundred ninety-seven billion, three hundred forty-five million, seven hundred sixty-three thousand, five hundred eighty-four".