81448801 has 16 divisors (see below), whose sum is σ = 99337600. Its totient is φ = 65225088.

The previous prime is 81448799. The next prime is 81448817. The reversal of 81448801 is 10884418.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 81448801 - 2¹ = 81448799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81448831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5515 + ... + 13903.

It is an arithmetic number, because the mean of its divisors is an integer number (6208600).

Almost surely, 2^81448801 is an apocalyptic number.

It is an amenable number.

81448801 is a deficient number, since it is larger than the sum of its proper divisors (17888799).

81448801 is a wasteful number, since it uses less digits than its factorization.

81448801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8488.

The product of its (nonzero) digits is 8192, while the sum is 34.

The square root of 81448801 is about 9024.8989468027. The cubic root of 81448801 is about 433.4725145950.

The spelling of 81448801 in words is "eighty-one million, four hundred forty-eight thousand, eight hundred one".