81263883423340 has 12 divisors (see below), whose sum is σ = 170654155189056. Its totient is φ = 32505553369328.

The previous prime is 81263883423323. The next prime is 81263883423361. The reversal of 81263883423340 is 4332438836218.

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, 2031597085564 + ... + 2031597085603.

It is an arithmetic number, because the mean of its divisors is an integer number (14221179599088).

Almost surely, 2^{81263883423340} is an apocalyptic number.

It is an amenable number.

81263883423340 is an abundant number, since it is smaller than the sum of its proper divisors (89390271765716).

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

81263883423340 is a wasteful number, since it uses less digits than its factorization.

81263883423340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063194171176 (or 4063194171174 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 55.

The spelling of 81263883423340 in words is "eighty-one trillion, two hundred sixty-three billion, eight hundred eighty-three million, four hundred twenty-three thousand, three hundred forty".