81300655799 has 8 divisors (see below), whose sum is σ = 88718532240. Its totient is φ = 73887264000.

The previous prime is 81300655771. The next prime is 81300655801. The reversal of 81300655799 is 99755600318.

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

It is not a de Polignac number, because 81300655799 - 2⁸ = 81300655543 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81300655799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81300655729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1083194 + ... + 1155815.

It is an arithmetic number, because the mean of its divisors is an integer number (11089816530).

Almost surely, 2^81300655799 is an apocalyptic number.

81300655799 is a deficient number, since it is larger than the sum of its proper divisors (7417876441).

81300655799 is a wasteful number, since it uses less digits than its factorization.

81300655799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242321.

The product of its (nonzero) digits is 2041200, while the sum is 53.

The spelling of 81300655799 in words is "eighty-one billion, three hundred million, six hundred fifty-five thousand, seven hundred ninety-nine".