81604102 has 8 divisors (see below), whose sum is σ = 122446800. Its totient is φ = 40788504.

The previous prime is 81604093. The next prime is 81604123. The reversal of 81604102 is 20140618.

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

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 3 ways as a sum of consecutive naturals, for example, 4524 + ... + 13552.

It is an arithmetic number, because the mean of its divisors is an integer number (15305850).

Almost surely, 2^81604102 is an apocalyptic number.

81604102 is a deficient number, since it is larger than the sum of its proper divisors (40842698).

81604102 is a wasteful number, since it uses less digits than its factorization.

81604102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13550.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 81604102 is about 9033.4988791719. The cubic root of 81604102 is about 433.7478449178.

The spelling of 81604102 in words is "eighty-one million, six hundred four thousand, one hundred two".