81441522514418 has 32 divisors (see below), whose sum is σ = 133948475798400. Its totient is φ = 36829867916160.

The previous prime is 81441522514399. The next prime is 81441522514537.

81441522514418 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53790080 + ... + 55283412.

It is an arithmetic number, because the mean of its divisors is an integer number (4185889868700).

Almost surely, 2^{81441522514418} is an apocalyptic number.

81441522514418 is a deficient number, since it is larger than the sum of its proper divisors (52506953283982).

81441522514418 is a wasteful number, since it uses less digits than its factorization.

81441522514418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506002.

The product of its digits is 1638400, while the sum is 50.

The spelling of 81441522514418 in words is "eighty-one trillion, four hundred forty-one billion, five hundred twenty-two million, five hundred fourteen thousand, four hundred eighteen".