81041365704 has 64 divisors (see below), whose sum is σ = 219330800640. Its totient is φ = 24805232640.

The previous prime is 81041365681. The next prime is 81041365711. The reversal of 81041365704 is 40756314018.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 620377 + ... + 739560.

It is an arithmetic number, because the mean of its divisors is an integer number (3427043760).

Almost surely, 2^81041365704 is an apocalyptic number.

It is an amenable number.

81041365704 is an abundant number, since it is smaller than the sum of its proper divisors (138289434936).

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

81041365704 is a wasteful number, since it uses less digits than its factorization.

81041365704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360150 (or 1360146 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 81041365704 in words is "eighty-one billion, forty-one million, three hundred sixty-five thousand, seven hundred four".