81148484 has 12 divisors (see below), whose sum is σ = 143808000. Its totient is φ = 40060488.

The previous prime is 81148477. The next prime is 81148499. The reversal of 81148484 is 48484118.

It is a super-3 number, since 3×81148484³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128084 + ... + 128715.

It is an arithmetic number, because the mean of its divisors is an integer number (11984000).

Almost surely, 2^81148484 is an apocalyptic number.

It is an amenable number.

81148484 is a deficient number, since it is larger than the sum of its proper divisors (62659516).

81148484 is a wasteful number, since it uses less digits than its factorization.

81148484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256882 (or 256880 counting only the distinct ones).

The product of its digits is 32768, while the sum is 38.

The square root of 81148484 is about 9008.2453341369. The cubic root of 81148484 is about 432.9390936383.

The spelling of 81148484 in words is "eighty-one million, one hundred forty-eight thousand, four hundred eighty-four".