999491196528 has 120 divisors (see below), whose sum is σ = 3164494709376. Its totient is φ = 302876107200.

The previous prime is 999491196511. The next prime is 999491196553. The reversal of 999491196528 is 825691194999.

999491196528 is a `hidden beast` number, since 9 + 9 + 9 + 4 + 9 + 1 + 1 + 96 + 528 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11642268 + ... + 11727803.

Almost surely, 2^999491196528 is an apocalyptic number.

It is an amenable number.

999491196528 is an abundant number, since it is smaller than the sum of its proper divisors (2165003512848).

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

999491196528 is a wasteful number, since it uses less digits than its factorization.

999491196528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23370105 (or 23370087 counting only the distinct ones).

The product of its digits is 113374080, while the sum is 72.

The spelling of 999491196528 in words is "nine hundred ninety-nine billion, four hundred ninety-one million, one hundred ninety-six thousand, five hundred twenty-eight".