81608054 has 8 divisors (see below), whose sum is σ = 133540488. Its totient is φ = 37094560.

The previous prime is 81608053. The next prime is 81608083. The reversal of 81608054 is 45080618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 81608054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81608053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1854707 + ... + 1854750.

It is an arithmetic number, because the mean of its divisors is an integer number (16692561).

Almost surely, 2^81608054 is an apocalyptic number.

81608054 is a deficient number, since it is larger than the sum of its proper divisors (51932434).

81608054 is a wasteful number, since it uses less digits than its factorization.

81608054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3709470.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 81608054 is about 9033.7176179024. The cubic root of 81608054 is about 433.7548467873.

The spelling of 81608054 in words is "eighty-one million, six hundred eight thousand, fifty-four".