81301343717712 has 160 divisors (see below), whose sum is σ = 212595476574208. Its totient is φ = 26771406225408.

The previous prime is 81301343717687. The next prime is 81301343717791. The reversal of 81301343717712 is 21771734310318.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2418730218 + ... + 2418763830.

Almost surely, 2^{81301343717712} is an apocalyptic number.

It is an amenable number.

81301343717712 is an abundant number, since it is smaller than the sum of its proper divisors (131294132856496).

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

81301343717712 is a wasteful number, since it uses less digits than its factorization.

81301343717712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35637 (or 35631 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 48.

The spelling of 81301343717712 in words is "eighty-one trillion, three hundred one billion, three hundred forty-three million, seven hundred seventeen thousand, seven hundred twelve".