81446361 has 8 divisors (see below), whose sum is σ = 111530304. Its totient is φ = 52830000.

The previous prime is 81446357. The next prime is 81446383. The reversal of 81446361 is 16364418.

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

It is not a de Polignac number, because 81446361 - 2² = 81446357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81446461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366765 + ... + 366986.

It is an arithmetic number, because the mean of its divisors is an integer number (13941288).

Almost surely, 2^81446361 is an apocalyptic number.

It is an amenable number.

81446361 is a deficient number, since it is larger than the sum of its proper divisors (30083943).

81446361 is a wasteful number, since it uses less digits than its factorization.

81446361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733791.

The product of its digits is 13824, while the sum is 33.

The square root of 81446361 is about 9024.7637642212. The cubic root of 81446361 is about 433.4681859719.

The spelling of 81446361 in words is "eighty-one million, four hundred forty-six thousand, three hundred sixty-one".