81441736754 has 16 divisors (see below), whose sum is σ = 142861253568. Its totient is φ = 34091889552.

The previous prime is 81441736751. The next prime is 81441736793. The reversal of 81441736754 is 45763714418.

It is not an unprimeable number, because it can be changed into a prime (81441736751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67642037 + ... + 67643240.

It is an arithmetic number, because the mean of its divisors is an integer number (8928828348).

Almost surely, 2^81441736754 is an apocalyptic number.

81441736754 is a deficient number, since it is larger than the sum of its proper divisors (61419516814).

81441736754 is a wasteful number, since it uses less digits than its factorization.

81441736754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135285329.

The product of its digits is 2257920, while the sum is 50.

The spelling of 81441736754 in words is "eighty-one billion, four hundred forty-one million, seven hundred thirty-six thousand, seven hundred fifty-four".