997490262600 has 1152 divisors, whose sum is σ = 3985628236800. Its totient is φ = 230712053760.

The previous prime is 997490262577. The next prime is 997490262661. The reversal of 997490262600 is 6262094799.

997490262600 is a `hidden beast` number, since 9 + 9 + 7 + 4 + 9 + 0 + 2 + 626 + 0 + 0 = 666.

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

It is an unprimeable number.

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 287 ways as a sum of consecutive naturals, for example, 1643311497 + ... + 1643312103.

Almost surely, 2^997490262600 is an apocalyptic number.

997490262600 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 997490262600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1992814118400).

997490262600 is an abundant number, since it is smaller than the sum of its proper divisors (2988137974200).

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

997490262600 is a wasteful number, since it uses less digits than its factorization.

997490262600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 997490262600 in words is "nine hundred ninety-seven billion, four hundred ninety million, two hundred sixty-two thousand, six hundred".