81901802326 has 16 divisors (see below), whose sum is σ = 130149331200. Its totient is φ = 38521284480.

The previous prime is 81901802303. The next prime is 81901802327. The reversal of 81901802326 is 62320810918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81901802327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 583926 + ... + 710473.

It is an arithmetic number, because the mean of its divisors is an integer number (8134333200).

Almost surely, 2^81901802326 is an apocalyptic number.

81901802326 is a deficient number, since it is larger than the sum of its proper divisors (48247528874).

81901802326 is a wasteful number, since it uses less digits than its factorization.

81901802326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296279.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 81901802326 in words is "eighty-one billion, nine hundred one million, eight hundred two thousand, three hundred twenty-six".