999534170880 has 864 divisors, whose sum is σ = 4036075924608. Its totient is φ = 223661260800.

The previous prime is 999534170861. The next prime is 999534170893. The reversal of 999534170880 is 88071435999.

999534170880 is a `hidden beast` number, since 9 + 9 + 9 + 534 + 17 + 0 + 8 + 80 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1559335360 + ... + 1559336000.

It is an arithmetic number, because the mean of its divisors is an integer number (4671384172).

Almost surely, 2^999534170880 is an apocalyptic number.

999534170880 is a gapful number since it is divisible by the number (90) 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 999534170880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2018037962304).

999534170880 is an abundant number, since it is smaller than the sum of its proper divisors (3036541753728).

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

999534170880 is a wasteful number, since it uses less digits than its factorization.

999534170880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053 (or 1036 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 999534170880 in words is "nine hundred ninety-nine billion, five hundred thirty-four million, one hundred seventy thousand, eight hundred eighty".