80812512 has 144 divisors (see below), whose sum is σ = 259413840. Its totient is φ = 24456960.

The previous prime is 80812489. The next prime is 80812553. The reversal of 80812512 is 21521808.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104158 + ... + 104930.

It is an arithmetic number, because the mean of its divisors is an integer number (1801485).

Almost surely, 2^80812512 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 80812512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129706920).

80812512 is an abundant number, since it is smaller than the sum of its proper divisors (178601328).

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

80812512 is a wasteful number, since it uses less digits than its factorization.

80812512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 80812512 is about 8989.5779656222. The cubic root of 80812512 is about 432.3407804895.

The spelling of 80812512 in words is "eighty million, eight hundred twelve thousand, five hundred twelve".