80851056 has 80 divisors (see below), whose sum is σ = 245400960. Its totient is φ = 22613760.

The previous prime is 80851039. The next prime is 80851091. The reversal of 80851056 is 65015808.

80851056 = 1574² + 1575² + ... + 1605².

It is a Harshad number since it is a multiple of its sum of digits (33).

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 15 ways as a sum of consecutive naturals, for example, 975 + ... + 12753.

It is an arithmetic number, because the mean of its divisors is an integer number (3067512).

Almost surely, 2^80851056 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 80851056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122700480).

80851056 is an abundant number, since it is smaller than the sum of its proper divisors (164549904).

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

80851056 is a wasteful number, since it uses less digits than its factorization.

80851056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11814 (or 11808 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 80851056 is about 8991.7215259371. The cubic root of 80851056 is about 432.4095053852.

The spelling of 80851056 in words is "eighty million, eight hundred fifty-one thousand, fifty-six".