997209948816 has 75 divisors (see below), whose sum is σ = 2886318958611. Its totient is φ = 332391333024.

The previous prime is 997209948751. The next prime is 997209948821. The reversal of 997209948816 is 618849902799.

The square root of 997209948816 is 998604.

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 (72).

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 35935875 + ... + 35963613.

Almost surely, 2^997209948816 is an apocalyptic number.

997209948816 is the 998604-th square number.

It is an amenable number.

997209948816 is an abundant number, since it is smaller than the sum of its proper divisors (1889109009795).

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

997209948816 is an frugal number, since it uses more digits than its factorization.

997209948816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55498 (or 27744 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 72.

It can be divided in two parts, 997209 and 948816, that added together give a square (1946025 = 1395²).

The spelling of 997209948816 in words is "nine hundred ninety-seven billion, two hundred nine million, nine hundred forty-eight thousand, eight hundred sixteen".