997818260112 has 80 divisors (see below), whose sum is σ = 2899467428160. Its totient is φ = 332606075040.

The previous prime is 997818260077. The next prime is 997818260113. The reversal of 997818260112 is 211062818799.

It is a happy number.

997818260112 is a `hidden beast` number, since 9 + 9 + 7 + 8 + 18 + 2 + 601 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (997818260113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14222814 + ... + 14292797.

It is an arithmetic number, because the mean of its divisors is an integer number (36243342852).

Almost surely, 2^997818260112 is an apocalyptic number.

It is an amenable number.

997818260112 is an abundant number, since it is smaller than the sum of its proper divisors (1901649168048).

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

997818260112 is an equidigital number, since it uses as much as digits as its factorization.

997818260112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28515640 (or 28515616 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 54.

The spelling of 997818260112 in words is "nine hundred ninety-seven billion, eight hundred eighteen million, two hundred sixty thousand, one hundred twelve".