997790848002 has 72 divisors (see below), whose sum is σ = 2349675256500. Its totient is φ = 305871007104.

The previous prime is 997790848001. The next prime is 997790848063. The reversal of 997790848002 is 200848097799.

It can be written as a sum of positive squares in 6 ways, for example, as 2443423761 + 995347424241 = 49431^2 + 997671^2 .

It is not an unprimeable number, because it can be changed into a prime (997790848001) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 208624 + ... + 1427972.

Almost surely, 2^997790848002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997790848002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1174837628250).

997790848002 is an abundant number, since it is smaller than the sum of its proper divisors (1351884408498).

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

997790848002 is a wasteful number, since it uses less digits than its factorization.

997790848002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219652 (or 1219636 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 997790848002 in words is "nine hundred ninety-seven billion, seven hundred ninety million, eight hundred forty-eight thousand, two".