81467580503 has 2 divisors, whose sum is σ = 81467580504. Its totient is φ = 81467580502.

The previous prime is 81467580461. The next prime is 81467580521. The reversal of 81467580503 is 30508576418.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81467580503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81467583503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40733790251 + 40733790252.

It is an arithmetic number, because the mean of its divisors is an integer number (40733790252).

Almost surely, 2^81467580503 is an apocalyptic number.

81467580503 is a deficient number, since it is larger than the sum of its proper divisors (1).

81467580503 is an equidigital number, since it uses as much as digits as its factorization.

81467580503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 81467580503 in words is "eighty-one billion, four hundred sixty-seven million, five hundred eighty thousand, five hundred three".