71447045513 has 4 divisors (see below), whose sum is σ = 71523297300. Its totient is φ = 71370793728.

The previous prime is 71447045489. The next prime is 71447045531. The reversal of 71447045513 is 31554074417.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43481841529 + 27965203984 = 208523^2 + 167228^2 .

It is a cyclic number.

It is not a de Polignac number, because 71447045513 - 2¹⁶ = 71446979977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71447045543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38124488 + ... + 38126361.

It is an arithmetic number, because the mean of its divisors is an integer number (17880824325).

Almost surely, 2^71447045513 is an apocalyptic number.

It is an amenable number.

71447045513 is a deficient number, since it is larger than the sum of its proper divisors (76251787).

71447045513 is an equidigital number, since it uses as much as digits as its factorization.

71447045513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76251786.

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 71447045513 in words is "seventy-one billion, four hundred forty-seven million, forty-five thousand, five hundred thirteen".