71256226605547 has 2 divisors, whose sum is σ = 71256226605548. Its totient is φ = 71256226605546.

The previous prime is 71256226605521. The next prime is 71256226605583. The reversal of 71256226605547 is 74550662265217.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71256226605547 - 2¹⁵ = 71256226572779 is a prime.

It is a super-2 number, since 2×71256226605547² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71256226605491 and 71256226605500.

It is not a weakly prime, because it can be changed into another prime (71256226605247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35628113302773 + 35628113302774.

It is an arithmetic number, because the mean of its divisors is an integer number (35628113302774).

Almost surely, 2^{71256226605547} is an apocalyptic number.

71256226605547 is a deficient number, since it is larger than the sum of its proper divisors (1).

71256226605547 is an equidigital number, since it uses as much as digits as its factorization.

71256226605547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336000, while the sum is 58.

The spelling of 71256226605547 in words is "seventy-one trillion, two hundred fifty-six billion, two hundred twenty-six million, six hundred five thousand, five hundred forty-seven".