81567445503 has 8 divisors (see below), whose sum is σ = 108938160000. Its totient is φ = 54287514008.

The previous prime is 81567445501. The next prime is 81567445507. The reversal of 81567445503 is 30554476518.

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 81567445503 - 2¹ = 81567445501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81567445501) 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, 22693653 + ... + 22697246.

It is an arithmetic number, because the mean of its divisors is an integer number (13617270000).

Almost surely, 2^81567445503 is an apocalyptic number.

81567445503 is a deficient number, since it is larger than the sum of its proper divisors (27370714497).

81567445503 is a wasteful number, since it uses less digits than its factorization.

81567445503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45391501.

The product of its (nonzero) digits is 2016000, while the sum is 48.

The spelling of 81567445503 in words is "eighty-one billion, five hundred sixty-seven million, four hundred forty-five thousand, five hundred three".