81675352559 has 2 divisors, whose sum is σ = 81675352560. Its totient is φ = 81675352558.

The previous prime is 81675352513. The next prime is 81675352567. The reversal of 81675352559 is 95525357618.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81675352559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81675352259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40837676279 + 40837676280.

It is an arithmetic number, because the mean of its divisors is an integer number (40837676280).

Almost surely, 2^81675352559 is an apocalyptic number.

81675352559 is a deficient number, since it is larger than the sum of its proper divisors (1).

81675352559 is an equidigital number, since it uses as much as digits as its factorization.

81675352559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340000, while the sum is 56.

The spelling of 81675352559 in words is "eighty-one billion, six hundred seventy-five million, three hundred fifty-two thousand, five hundred fifty-nine".