81725596 has 24 divisors (see below), whose sum is σ = 156658320. Its totient is φ = 37132032.

The previous prime is 81725591. The next prime is 81725597. The reversal of 81725596 is 69552718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81725591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18750 + ... + 22693.

It is an arithmetic number, because the mean of its divisors is an integer number (6527430).

Almost surely, 2^81725596 is an apocalyptic number.

It is an amenable number.

81725596 is a deficient number, since it is larger than the sum of its proper divisors (74932724).

81725596 is a wasteful number, since it uses less digits than its factorization.

81725596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41493 (or 41491 counting only the distinct ones).

The product of its digits is 151200, while the sum is 43.

The square root of 81725596 is about 9040.2210149974. The cubic root of 81725596 is about 433.9629959885.

The spelling of 81725596 in words is "eighty-one million, seven hundred twenty-five thousand, five hundred ninety-six".