81453635418 has 16 divisors (see below), whose sum is σ = 162968294016. Its totient is φ = 27141041280.

The previous prime is 81453635401. The next prime is 81453635467.

81453635418 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2525271 + ... + 2557322.

It is an arithmetic number, because the mean of its divisors is an integer number (10185518376).

Almost surely, 2^81453635418 is an apocalyptic number.

81453635418 is an abundant number, since it is smaller than the sum of its proper divisors (81514658598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81453635418 is a wasteful number, since it uses less digits than its factorization.

81453635418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5085269.

The product of its digits is 1382400, while the sum is 48.

The spelling of 81453635418 in words is "eighty-one billion, four hundred fifty-three million, six hundred thirty-five thousand, four hundred eighteen".