81682414359 has 128 divisors (see below), whose sum is σ = 139524833280. Its totient is φ = 41370061824.

The previous prime is 81682414349. The next prime is 81682414399. The reversal of 81682414359 is 95341428618.

It is not a de Polignac number, because 81682414359 - 2¹² = 81682410263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81682414349) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 149327724 + ... + 149328270.

It is an arithmetic number, because the mean of its divisors is an integer number (1090037760).

Almost surely, 2^81682414359 is an apocalyptic number.

81682414359 is a deficient number, since it is larger than the sum of its proper divisors (57842418921).

81682414359 is a wasteful number, since it uses less digits than its factorization.

81682414359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829.

The product of its digits is 1658880, while the sum is 51.

The spelling of 81682414359 in words is "eighty-one billion, six hundred eighty-two million, four hundred fourteen thousand, three hundred fifty-nine".