81452425418 has 32 divisors (see below), whose sum is σ = 150887028096. Its totient is φ = 32112940608.

The previous prime is 81452425403. The next prime is 81452425427.

It is a happy number.

81452425418 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 710396 + ... + 817047.

It is an arithmetic number, because the mean of its divisors is an integer number (4715219628).

Almost surely, 2^81452425418 is an apocalyptic number.

81452425418 is a deficient number, since it is larger than the sum of its proper divisors (69434602678).

81452425418 is a wasteful number, since it uses less digits than its factorization.

81452425418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527758.

The product of its digits is 409600, while the sum is 44.

The spelling of 81452425418 in words is "eighty-one billion, four hundred fifty-two million, four hundred twenty-five thousand, four hundred eighteen".