81153418120814 has 16 divisors (see below), whose sum is σ = 131471775591408. Its totient is φ = 37347483041472.

The previous prime is 81153418120777. The next prime is 81153418120837. The reversal of 81153418120814 is 41802181435118.

It is a congruent number.

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, 4497520247 + ... + 4497538290.

It is an arithmetic number, because the mean of its divisors is an integer number (8216985974463).

Almost surely, 2^{81153418120814} is an apocalyptic number.

81153418120814 is a deficient number, since it is larger than the sum of its proper divisors (50318357470594).

81153418120814 is a wasteful number, since it uses less digits than its factorization.

81153418120814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8995058899.

The product of its (nonzero) digits is 245760, while the sum is 47.

The spelling of 81153418120814 in words is "eighty-one trillion, one hundred fifty-three billion, four hundred eighteen million, one hundred twenty thousand, eight hundred fourteen".