999275663616 has 576 divisors, whose sum is σ = 2914825105920. Its totient is φ = 303216721920.

The previous prime is 999275663569. The next prime is 999275663621. The reversal of 999275663616 is 616366572999.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5177594016 + ... + 5177594208.

Almost surely, 2^999275663616 is an apocalyptic number.

999275663616 is a gapful number since it is divisible by the number (96) 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 999275663616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1457412552960).

999275663616 is an abundant number, since it is smaller than the sum of its proper divisors (1915549442304).

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

999275663616 is a wasteful number, since it uses less digits than its factorization.

999275663616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 428 counting only the distinct ones).

The product of its digits is 198404640, while the sum is 69.

The spelling of 999275663616 in words is "nine hundred ninety-nine billion, two hundred seventy-five million, six hundred sixty-three thousand, six hundred sixteen".