997241978322 has 42 divisors (see below), whose sum is σ = 2242854241077. Its totient is φ = 332401282416.

The previous prime is 997241978287. The next prime is 997241978389. The reversal of 997241978322 is 223879142799.

It can be written as a sum of positive squares in 2 ways, for example, as 827770612761 + 169471365561 = 909819^2 + 411669^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=706131.

It is a self number, because there is not a number n which added to its sum of digits gives 997241978322.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 38117998 + ... + 38144150.

Almost surely, 2^997241978322 is an apocalyptic number.

997241978322 is an abundant number, since it is smaller than the sum of its proper divisors (1245612262755).

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

997241978322 is an frugal number, since it uses more digits than its factorization.

997241978322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52326 (or 26158 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 63.

The spelling of 997241978322 in words is "nine hundred ninety-seven billion, two hundred forty-one million, nine hundred seventy-eight thousand, three hundred twenty-two".