81740144762 has 16 divisors (see below), whose sum is σ = 123438904512. Its totient is φ = 40593916800.

The previous prime is 81740144741. The next prime is 81740144771. The reversal of 81740144762 is 26744104718.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3089273 + ... + 3115619.

It is an arithmetic number, because the mean of its divisors is an integer number (7714931532).

Almost surely, 2^81740144762 is an apocalyptic number.

81740144762 is a deficient number, since it is larger than the sum of its proper divisors (41698759750).

81740144762 is a wasteful number, since it uses less digits than its factorization.

81740144762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36773.

The product of its (nonzero) digits is 301056, while the sum is 44.

The spelling of 81740144762 in words is "eighty-one billion, seven hundred forty million, one hundred forty-four thousand, seven hundred sixty-two".