81047874018 has 8 divisors (see below), whose sum is σ = 162095748048. Its totient is φ = 27015958004.

The previous prime is 81047873971. The next prime is 81047874067.

81047874018 is nontrivially palindromic in base 10.

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

81047874018 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6753989496 + ... + 6753989507.

It is an arithmetic number, because the mean of its divisors is an integer number (20261968506).

Almost surely, 2^81047874018 is an apocalyptic number.

81047874018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81047874018 is a wasteful number, since it uses less digits than its factorization.

81047874018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13507979008.

The product of its (nonzero) digits is 401408, while the sum is 48.

The spelling of 81047874018 in words is "eighty-one billion, forty-seven million, eight hundred seventy-four thousand, eighteen".