81548802 has 16 divisors (see below), whose sum is σ = 181219680. Its totient is φ = 27182916.

The previous prime is 81548771. The next prime is 81548809. The reversal of 81548802 is 20884518.

It is not an unprimeable number, because it can be changed into a prime (81548809) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 755028 + ... + 755135.

It is an arithmetic number, because the mean of its divisors is an integer number (11326230).

Almost surely, 2^81548802 is an apocalyptic number.

81548802 is an abundant number, since it is smaller than the sum of its proper divisors (99670878).

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

81548802 is a wasteful number, since it uses less digits than its factorization.

81548802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1510174 (or 1510168 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 81548802 is about 9030.4375309284. The cubic root of 81548802 is about 433.6498446316.

The spelling of 81548802 in words is "eighty-one million, five hundred forty-eight thousand, eight hundred two".