81065264615801 has 8 divisors (see below), whose sum is σ = 83860739752320. Its totient is φ = 78269797558288.

The previous prime is 81065264615759. The next prime is 81065264615807. The reversal of 81065264615801 is 10851646256018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81065264615801 - 2¹⁰ = 81065264614777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81065264615807) 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, 24135170 + ... + 27288036.

It is an arithmetic number, because the mean of its divisors is an integer number (10482592469040).

Almost surely, 2^{81065264615801} is an apocalyptic number.

It is an amenable number.

81065264615801 is a deficient number, since it is larger than the sum of its proper divisors (2795475136519).

81065264615801 is a wasteful number, since it uses less digits than its factorization.

81065264615801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039503.

The product of its (nonzero) digits is 2764800, while the sum is 53.

The spelling of 81065264615801 in words is "eighty-one trillion, sixty-five billion, two hundred sixty-four million, six hundred fifteen thousand, eight hundred one".