81360763503 has 8 divisors (see below), whose sum is σ = 108485999616. Its totient is φ = 54238018200.

The previous prime is 81360763483. The next prime is 81360763513. The reversal of 81360763503 is 30536706318.

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

It is not a de Polignac number, because 81360763503 - 2⁶ = 81360763439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81360763513) 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, 545103 + ... + 678128.

It is an arithmetic number, because the mean of its divisors is an integer number (13560749952).

Almost surely, 2^81360763503 is an apocalyptic number.

81360763503 is a deficient number, since it is larger than the sum of its proper divisors (27125236113).

81360763503 is a wasteful number, since it uses less digits than its factorization.

81360763503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245405.

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 81360763503 in words is "eighty-one billion, three hundred sixty million, seven hundred sixty-three thousand, five hundred three".