71404640417 has 4 divisors (see below), whose sum is σ = 77895971376. Its totient is φ = 64913309460.

The previous prime is 71404640357. The next prime is 71404640429.

71404640417 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71404640417 - 2¹⁰ = 71404639393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71404670417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245665463 + ... + 3245665484.

It is an arithmetic number, because the mean of its divisors is an integer number (19473992844).

Almost surely, 2^71404640417 is an apocalyptic number.

It is an amenable number.

71404640417 is a deficient number, since it is larger than the sum of its proper divisors (6491330959).

71404640417 is a wasteful number, since it uses less digits than its factorization.

71404640417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6491330958.

The product of its (nonzero) digits is 75264, while the sum is 38.

The spelling of 71404640417 in words is "seventy-one billion, four hundred four million, six hundred forty thousand, four hundred seventeen".