81782353814 has 16 divisors (see below), whose sum is σ = 145032746400. Its totient is φ = 33840973824.

The previous prime is 81782353813. The next prime is 81782353817. The reversal of 81782353814 is 41835328718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81782353811) 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, 100716779 + ... + 100717590.

It is an arithmetic number, because the mean of its divisors is an integer number (9064546650).

Almost surely, 2^81782353814 is an apocalyptic number.

81782353814 is a deficient number, since it is larger than the sum of its proper divisors (63250392586).

81782353814 is a wasteful number, since it uses less digits than its factorization.

81782353814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201434407.

The product of its digits is 1290240, while the sum is 50.

The spelling of 81782353814 in words is "eighty-one billion, seven hundred eighty-two million, three hundred fifty-three thousand, eight hundred fourteen".