999499918975488 has 270 divisors, whose sum is σ = 3355633968618789. Its totient is φ = 285567113244672.

The previous prime is 999499918975447. The next prime is 999499918975507. The reversal of 999499918975488 is 884579819994999.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

999499918975488 is a `hidden beast` number, since 9 + 9 + 9 + 4 + 9 + 9 + 9 + 18 + 97 + 5 + 488 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 667154184931584 + 332345734043904 = 25829328^2 + 18230352^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=22355088.

It is a self number, because there is not a number n which added to its sum of digits gives 999499918975488.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 15022585870 + ... + 15022652402.

Almost surely, 2^{999499918975488} is an apocalyptic number.

999499918975488 is a gapful number since it is divisible by the number (98) 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 999499918975488

999499918975488 is an abundant number, since it is smaller than the sum of its proper divisors (2356134049643301).

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

999499918975488 is an frugal number, since it uses more digits than its factorization.

999499918975488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133104 (or 66545 counting only the distinct ones).

The product of its digits is 1371372871680, while the sum is 108.

The spelling of 999499918975488 in words is "nine hundred ninety-nine trillion, four hundred ninety-nine billion, nine hundred eighteen million, nine hundred seventy-five thousand, four hundred eighty-eight".