997999506000 has 480 divisors, whose sum is σ = 3986812946688. Its totient is φ = 227932185600.

The previous prime is 997999505983. The next prime is 997999506061. The reversal of 997999506000 is 605999799.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 217095702 + ... + 217100298.

Almost surely, 2^997999506000 is an apocalyptic number.

997999506000 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997999506000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1993406473344).

997999506000 is an abundant number, since it is smaller than the sum of its proper divisors (2988813440688).

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

997999506000 is a wasteful number, since it uses less digits than its factorization.

997999506000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6356 (or 6337 counting only the distinct ones).

The product of its (nonzero) digits is 12400290, while the sum is 63.

The spelling of 997999506000 in words is "nine hundred ninety-seven billion, nine hundred ninety-nine million, five hundred six thousand".