81480804 has 12 divisors (see below), whose sum is σ = 190121904. Its totient is φ = 27160264.

The previous prime is 81480793. The next prime is 81480857. The reversal of 81480804 is 40808418.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3395022 + ... + 3395045.

It is an arithmetic number, because the mean of its divisors is an integer number (15843492).

Almost surely, 2^81480804 is an apocalyptic number.

It is an amenable number.

81480804 is an abundant number, since it is smaller than the sum of its proper divisors (108641100).

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

81480804 is a wasteful number, since it uses less digits than its factorization.

81480804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6790074 (or 6790072 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 33.

The square root of 81480804 is about 9026.6718119138. The cubic root of 81480804 is about 433.5292807442.

It can be divided in two parts, 814 and 80804, that added together give a palindrome (81618).

The spelling of 81480804 in words is "eighty-one million, four hundred eighty thousand, eight hundred four".