81463036418 has 16 divisors (see below), whose sum is σ = 125312292864. Its totient is φ = 39699464640.

The previous prime is 81463036411. The next prime is 81463036433.

81463036418 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (81463036411) 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, 1775330 + ... + 1820637.

It is an arithmetic number, because the mean of its divisors is an integer number (7832018304).

Almost surely, 2^81463036418 is an apocalyptic number.

81463036418 is a deficient number, since it is larger than the sum of its proper divisors (43849256446).

81463036418 is a wasteful number, since it uses less digits than its factorization.

81463036418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3596257.

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 81463036418 in words is "eighty-one billion, four hundred sixty-three million, thirty-six thousand, four hundred eighteen".