81354245318 has 8 divisors (see below), whose sum is σ = 122034725712. Its totient is φ = 40676003416.

The previous prime is 81354245317. The next prime is 81354245327.

81354245318 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×81354245318² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81354245317) 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 3 ways as a sum of consecutive naturals, for example, 465605 + ... + 616032.

It is an arithmetic number, because the mean of its divisors is an integer number (15254340714).

Almost surely, 2^81354245318 is an apocalyptic number.

81354245318 is a deficient number, since it is larger than the sum of its proper divisors (40680480394).

81354245318 is a wasteful number, since it uses less digits than its factorization.

81354245318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119246.

The product of its digits is 460800, while the sum is 44.

The spelling of 81354245318 in words is "eighty-one billion, three hundred fifty-four million, two hundred forty-five thousand, three hundred eighteen".