81348081468012 has 72 divisors (see below), whose sum is σ = 208259288677440. Its totient is φ = 26769378355200.

The previous prime is 81348081467987. The next prime is 81348081468037. The reversal of 81348081468012 is 21086418084318.

81348081468012 is a `hidden beast` number, since 8 + 1 + 3 + 480 + 8 + 146 + 8 + 0 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (81348081467987) and next prime (81348081468037).

It is a self number, because there is not a number n which added to its sum of digits gives 81348081468012.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20574262 + ... + 24207362.

It is an arithmetic number, because the mean of its divisors is an integer number (2892490120520).

Almost surely, 2^{81348081468012} is an apocalyptic number.

It is an amenable number.

81348081468012 is an abundant number, since it is smaller than the sum of its proper divisors (126911207209428).

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

81348081468012 is a wasteful number, since it uses less digits than its factorization.

81348081468012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641063 (or 3641058 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 54.

The spelling of 81348081468012 in words is "eighty-one trillion, three hundred forty-eight billion, eighty-one million, four hundred sixty-eight thousand, twelve".