999694431744 has 160 divisors (see below), whose sum is σ = 2705609972736. Its totient is φ = 327948042240.

The previous prime is 999694431713. The next prime is 999694431761. The reversal of 999694431744 is 447134496999.

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, 62917369 + ... + 62933255.

Almost surely, 2^999694431744 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 999694431744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1352804986368).

999694431744 is an abundant number, since it is smaller than the sum of its proper divisors (1705915540992).

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

999694431744 is a wasteful number, since it uses less digits than its factorization.

999694431744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16556 (or 16540 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 69.

The spelling of 999694431744 in words is "nine hundred ninety-nine billion, six hundred ninety-four million, four hundred thirty-one thousand, seven hundred forty-four".