997123338456 has 32 divisors (see below), whose sum is σ = 2848923824640. Its totient is φ = 284892382368.

The previous prime is 997123338437. The next prime is 997123338511. The reversal of 997123338456 is 654833321799.

It is a self number, because there is not a number n which added to its sum of digits gives 997123338456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2967628816 + ... + 2967629151.

It is an arithmetic number, because the mean of its divisors is an integer number (89028869520).

Almost surely, 2^997123338456 is an apocalyptic number.

It is an amenable number.

997123338456 is an abundant number, since it is smaller than the sum of its proper divisors (1851800486184).

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

997123338456 is a wasteful number, since it uses less digits than its factorization.

997123338456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5935257983 (or 5935257979 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 60.

The spelling of 997123338456 in words is "nine hundred ninety-seven billion, one hundred twenty-three million, three hundred thirty-eight thousand, four hundred fifty-six".