71002240447 has 4 divisors (see below), whose sum is σ = 71253132040. Its totient is φ = 70751348856.

The previous prime is 71002240339. The next prime is 71002240457. The reversal of 71002240447 is 74404220017.

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

It is a cyclic number.

It is not a de Polignac number, because 71002240447 - 2³¹ = 68854756799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71002240457) 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, 125445372 + ... + 125445937.

It is an arithmetic number, because the mean of its divisors is an integer number (17813283010).

Almost surely, 2^71002240447 is an apocalyptic number.

71002240447 is a deficient number, since it is larger than the sum of its proper divisors (250891593).

71002240447 is a wasteful number, since it uses less digits than its factorization.

71002240447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250891592.

The product of its (nonzero) digits is 12544, while the sum is 31.

The spelling of 71002240447 in words is "seventy-one billion, two million, two hundred forty thousand, four hundred forty-seven".