81254366345218 has 32 divisors (see below), whose sum is σ = 136298530146240. Its totient is φ = 36008144640000.

The previous prime is 81254366345209. The next prime is 81254366345233.

It is a happy number.

81254366345218 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, 29732703 + ... + 32350306.

It is an arithmetic number, because the mean of its divisors is an integer number (4259329067070).

Almost surely, 2^{81254366345218} is an apocalyptic number.

81254366345218 is a deficient number, since it is larger than the sum of its proper divisors (55044163801022).

81254366345218 is a wasteful number, since it uses less digits than its factorization.

81254366345218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62084514.

The product of its digits is 33177600, while the sum is 58.

The spelling of 81254366345218 in words is "eighty-one trillion, two hundred fifty-four billion, three hundred sixty-six million, three hundred forty-five thousand, two hundred eighteen".