81602814 has 8 divisors (see below), whose sum is σ = 163205640. Its totient is φ = 27200936.

The previous prime is 81602809. The next prime is 81602821. The reversal of 81602814 is 41820618.

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

81602814 is an admirable number.

It is a Curzon number.

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, 6800229 + ... + 6800240.

It is an arithmetic number, because the mean of its divisors is an integer number (20400705).

Almost surely, 2^81602814 is an apocalyptic number.

81602814 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81602814 is a wasteful number, since it uses less digits than its factorization.

81602814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13600474.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 81602814 is about 9033.4275886842. The cubic root of 81602814 is about 433.7455628832.

The spelling of 81602814 in words is "eighty-one million, six hundred two thousand, eight hundred fourteen".