81548408 has 16 divisors (see below), whose sum is σ = 153112680. Its totient is φ = 40718368.

The previous prime is 81548393. The next prime is 81548419. The reversal of 81548408 is 80484518.

It is a congruent number.

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, 410 + ... + 12777.

Almost surely, 2^81548408 is an apocalyptic number.

It is an amenable number.

81548408 is a deficient number, since it is larger than the sum of its proper divisors (71564272).

81548408 is a wasteful number, since it uses less digits than its factorization.

81548408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13966 (or 13962 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 38.

The square root of 81548408 is about 9030.4157157907. The cubic root of 81548408 is about 433.6491462428.

The spelling of 81548408 in words is "eighty-one million, five hundred forty-eight thousand, four hundred eight".