997992652800 has 1344 divisors, whose sum is σ = 3994465837824. Its totient is φ = 216583372800.

The previous prime is 997992652799. The next prime is 997992652841. The reversal of 997992652800 is 8256299799.

It is a Harshad number since it is a multiple of its sum of digits (66).

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, 3250790247 + ... + 3250790553.

It is an arithmetic number, because the mean of its divisors is an integer number (2972072796).

Almost surely, 2^997992652800 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997992652800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1997232918912).

997992652800 is an abundant number, since it is smaller than the sum of its proper divisors (2996473185024).

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

997992652800 is a wasteful number, since it uses less digits than its factorization.

997992652800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 66.

The spelling of 997992652800 in words is "nine hundred ninety-seven billion, nine hundred ninety-two million, six hundred fifty-two thousand, eight hundred".