71729453459 has 2 divisors, whose sum is σ = 71729453460. Its totient is φ = 71729453458.

The previous prime is 71729453437. The next prime is 71729453513. The reversal of 71729453459 is 95435492717.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71729453459 is a prime.

It is a super-2 number, since 2×71729453459² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71729453759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35864726729 + 35864726730.

It is an arithmetic number, because the mean of its divisors is an integer number (35864726730).

Almost surely, 2^71729453459 is an apocalyptic number.

71729453459 is a deficient number, since it is larger than the sum of its proper divisors (1).

71729453459 is an equidigital number, since it uses as much as digits as its factorization.

71729453459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9525600, while the sum is 56.

The spelling of 71729453459 in words is "seventy-one billion, seven hundred twenty-nine million, four hundred fifty-three thousand, four hundred fifty-nine".