81648352 has 12 divisors (see below), whose sum is σ = 160745256. Its totient is φ = 40824160.

The previous prime is 81648341. The next prime is 81648373. The reversal of 81648352 is 25384618.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275724 + ... + 1275787.

It is an arithmetic number, because the mean of its divisors is an integer number (13395438).

Almost surely, 2^81648352 is an apocalyptic number.

It is an amenable number.

81648352 is a deficient number, since it is larger than the sum of its proper divisors (79096904).

81648352 is a wasteful number, since it uses less digits than its factorization.

81648352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551521 (or 2551513 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 81648352 is about 9035.9477643466. The cubic root of 81648352 is about 433.8262309854.

The spelling of 81648352 in words is "eighty-one million, six hundred forty-eight thousand, three hundred fifty-two".