81648376 has 32 divisors (see below), whose sum is σ = 155610000. Its totient is φ = 40158720.

The previous prime is 81648373. The next prime is 81648397. The reversal of 81648376 is 67384618.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81648373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163375 + ... + 163873.

Almost surely, 2^81648376 is an apocalyptic number.

It is an amenable number.

81648376 is a deficient number, since it is larger than the sum of its proper divisors (73961624).

81648376 is a wasteful number, since it uses less digits than its factorization.

81648376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799 (or 795 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 81648376 is about 9035.9490923754. The cubic root of 81648376 is about 433.8262734922.

The spelling of 81648376 in words is "eighty-one million, six hundred forty-eight thousand, three hundred seventy-six".