999081799632 has 80 divisors (see below), whose sum is σ = 3277411204480. Its totient is φ = 285451941888.

The previous prime is 999081799603. The next prime is 999081799657. The reversal of 999081799632 is 236997180999.

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 (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165189073 + ... + 165195120.

It is an arithmetic number, because the mean of its divisors is an integer number (40967640056).

Almost surely, 2^999081799632 is an apocalyptic number.

It is an amenable number.

999081799632 is an abundant number, since it is smaller than the sum of its proper divisors (2278329404848).

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

999081799632 is a wasteful number, since it uses less digits than its factorization.

999081799632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330384217 (or 330384205 counting only the distinct ones).

The product of its (nonzero) digits is 119042784, while the sum is 72.

The spelling of 999081799632 in words is "nine hundred ninety-nine billion, eighty-one million, seven hundred ninety-nine thousand, six hundred thirty-two".