80561286 has 72 divisors (see below), whose sum is σ = 192185136. Its totient is φ = 24373440.

The previous prime is 80561279. The next prime is 80561303. The reversal of 80561286 is 68216508.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 80561286.

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 35 ways as a sum of consecutive naturals, for example, 215796 + ... + 216168.

It is an arithmetic number, because the mean of its divisors is an integer number (2669238).

Almost surely, 2^80561286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80561286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96092568).

80561286 is an abundant number, since it is smaller than the sum of its proper divisors (111623850).

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

80561286 is a wasteful number, since it uses less digits than its factorization.

80561286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 80561286 is about 8975.5939079261. The cubic root of 80561286 is about 431.8923021140.

The spelling of 80561286 in words is "eighty million, five hundred sixty-one thousand, two hundred eighty-six".