80001800010 has 128 divisors (see below), whose sum is σ = 232836664320. Its totient is φ = 19385697600.

The previous prime is 80001799963. The next prime is 80001800071. The reversal of 80001800010 is 1000810008.

It is a happy number.

80001800010 is a nontrivial binomial coefficient, being equal to C(400005, 2).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 63 ways as a sum of consecutive naturals, for example, 8795565 + ... + 8804655.

It is an arithmetic number, because the mean of its divisors is an integer number (1819036440).

Almost surely, 2^80001800010 is an apocalyptic number.

80001800010 is the 400004-th triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80001800010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116418332160).

80001800010 is an abundant number, since it is smaller than the sum of its proper divisors (152834864310).

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

80001800010 is a wasteful number, since it uses less digits than its factorization.

80001800010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12081 (or 12075 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The spelling of 80001800010 in words is "eighty billion, one million, eight hundred thousand, ten".