81044632 has 16 divisors (see below), whose sum is σ = 154826640. Its totient is φ = 39757536.

The previous prime is 81044629. The next prime is 81044641. The reversal of 81044632 is 23644018.

It is a self number, because there is not a number n which added to its sum of digits gives 81044632.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95148 + ... + 95995.

It is an arithmetic number, because the mean of its divisors is an integer number (9676665).

Almost surely, 2^81044632 is an apocalyptic number.

It is an amenable number.

81044632 is a deficient number, since it is larger than the sum of its proper divisors (73782008).

81044632 is a wasteful number, since it uses less digits than its factorization.

81044632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191202 (or 191198 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 81044632 is about 9002.4792140832. The cubic root of 81044632 is about 432.7543262323.

The spelling of 81044632 in words is "eighty-one million, forty-four thousand, six hundred thirty-two".