81481496 has 16 divisors (see below), whose sum is σ = 153176400. Its totient is φ = 40634464.

The previous prime is 81481487. The next prime is 81481501. The reversal of 81481496 is 69418418.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9980 + ... + 16203.

It is an arithmetic number, because the mean of its divisors is an integer number (9573525).

Almost surely, 2^81481496 is an apocalyptic number.

It is an amenable number.

81481496 is a deficient number, since it is larger than the sum of its proper divisors (71694904).

81481496 is a wasteful number, since it uses less digits than its factorization.

81481496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26578 (or 26574 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 81481496 is about 9026.7101426821. The cubic root of 81481496 is about 433.5305080329.

The spelling of 81481496 in words is "eighty-one million, four hundred eighty-one thousand, four hundred ninety-six".