81364622 has 8 divisors (see below), whose sum is σ = 122824776. Its totient is φ = 40423032.

The previous prime is 81364589. The next prime is 81364627. The reversal of 81364622 is 22646318.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81364627) 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 3 ways as a sum of consecutive naturals, for example, 129248 + ... + 129875.

It is an arithmetic number, because the mean of its divisors is an integer number (15353097).

Almost surely, 2^81364622 is an apocalyptic number.

81364622 is a deficient number, since it is larger than the sum of its proper divisors (41460154).

81364622 is a wasteful number, since it uses less digits than its factorization.

81364622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259282.

The product of its digits is 13824, while the sum is 32.

The square root of 81364622 is about 9020.2340324406. The cubic root of 81364622 is about 433.3231288853.

The spelling of 81364622 in words is "eighty-one million, three hundred sixty-four thousand, six hundred twenty-two".