71443644365 has 4 divisors (see below), whose sum is σ = 85732373244. Its totient is φ = 57154915488.

The previous prime is 71443644341. The next prime is 71443644383. The reversal of 71443644365 is 56344634417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56344634417 = 86287 ⋅652991.

It can be written as a sum of positive squares in 2 ways, for example, as 22780166761 + 48663477604 = 150931^2 + 220598^2 .

It is a cyclic number.

It is not a de Polignac number, because 71443644365 - 2⁶ = 71443644301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7144364432 + ... + 7144364441.

It is an arithmetic number, because the mean of its divisors is an integer number (21433093311).

Almost surely, 2^71443644365 is an apocalyptic number.

It is an amenable number.

71443644365 is a deficient number, since it is larger than the sum of its proper divisors (14288728879).

71443644365 is a wasteful number, since it uses less digits than its factorization.

71443644365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14288728878.

The product of its digits is 2903040, while the sum is 47.

The spelling of 71443644365 in words is "seventy-one billion, four hundred forty-three million, six hundred forty-four thousand, three hundred sixty-five".