81632411423618 has 16 divisors (see below), whose sum is σ = 133581488040000. Its totient is φ = 37105314212400.

The previous prime is 81632411423611. The next prime is 81632411423713.

It is a happy number.

81632411423618 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (81632411423611) 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, 13807838 + ... + 18812793.

It is an arithmetic number, because the mean of its divisors is an integer number (8348843002500).

Almost surely, 2^{81632411423618} is an apocalyptic number.

81632411423618 is a deficient number, since it is larger than the sum of its proper divisors (51949076616382).

81632411423618 is a wasteful number, since it uses less digits than its factorization.

81632411423618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32734393.

The product of its digits is 1327104, while the sum is 50.

It can be divided in two parts, 8163241 and 1423618, that added together give a palindrome (9586859).

The spelling of 81632411423618 in words is "eighty-one trillion, six hundred thirty-two billion, four hundred eleven million, four hundred twenty-three thousand, six hundred eighteen".