81069896018 has 16 divisors (see below), whose sum is σ = 123156458880. Its totient is φ = 40020966000.

The previous prime is 81069896003. The next prime is 81069896041.

81069896018 is nontrivially palindromic in base 10.

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, 755258 + ... + 855893.

It is an arithmetic number, because the mean of its divisors is an integer number (7697278680).

Almost surely, 2^81069896018 is an apocalyptic number.

81069896018 is a deficient number, since it is larger than the sum of its proper divisors (42086562862).

81069896018 is a wasteful number, since it uses less digits than its factorization.

81069896018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611473.

The product of its (nonzero) digits is 1492992, while the sum is 56.

The spelling of 81069896018 in words is "eighty-one billion, sixty-nine million, eight hundred ninety-six thousand, eighteen".