81148008 has 32 divisors (see below), whose sum is σ = 203932800. Its totient is φ = 26907648.

The previous prime is 81147973. The next prime is 81148019. The reversal of 81148008 is 80084118.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4128 + ... + 13391.

It is an arithmetic number, because the mean of its divisors is an integer number (6372900).

Almost surely, 2^81148008 is an apocalyptic number.

It is an amenable number.

81148008 is an abundant number, since it is smaller than the sum of its proper divisors (122784792).

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

81148008 is a wasteful number, since it uses less digits than its factorization.

81148008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17721 (or 17717 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 81148008 is about 9008.2189138586. The cubic root of 81148008 is about 432.9382471267.

The spelling of 81148008 in words is "eighty-one million, one hundred forty-eight thousand, eight".