81359060 has 24 divisors (see below), whose sum is σ = 171884160. Its totient is φ = 32347424.

The previous prime is 81359051. The next prime is 81359077. The reversal of 81359060 is 6095318.

It is a congruent number.

It is an unprimeable number.

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, 8840 + ... + 15519.

It is an arithmetic number, because the mean of its divisors is an integer number (7161840).

Almost surely, 2^81359060 is an apocalyptic number.

It is an amenable number.

81359060 is an abundant number, since it is smaller than the sum of its proper divisors (90525100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81359060 is a wasteful number, since it uses less digits than its factorization.

81359060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24535 (or 24533 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 81359060 is about 9019.9257203150. The cubic root of 81359060 is about 433.3132548225.

The spelling of 81359060 in words is "eighty-one million, three hundred fifty-nine thousand, sixty".