991546996 has 48 divisors (see below), whose sum is σ = 1998360000. Its totient is φ = 425744640.

The previous prime is 991546987. The next prime is 991547027. The reversal of 991546996 is 699645199.

991546996 = 275² + 276² + ... + 1441².

It is a self number, because there is not a number n which added to its sum of digits gives 991546996.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 323680 + ... + 326728.

It is an arithmetic number, because the mean of its divisors is an integer number (41632500).

Almost surely, 2^991546996 is an apocalyptic number.

It is an amenable number.

991546996 is an abundant number, since it is smaller than the sum of its proper divisors (1006813004).

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

991546996 is a wasteful number, since it uses less digits than its factorization.

991546996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3472 (or 3470 counting only the distinct ones).

The product of its digits is 4723920, while the sum is 58.

The square root of 991546996 is about 31488.8392291618. The cubic root of 991546996 is about 997.1743552520.

The spelling of 991546996 in words is "nine hundred ninety-one million, five hundred forty-six thousand, nine hundred ninety-six".