71073538663 has 4 divisors (see below), whose sum is σ = 72807039648. Its totient is φ = 69340037680.

The previous prime is 71073538637. The next prime is 71073538673. The reversal of 71073538663 is 36683537017.

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 71073538663 - 2⁵ = 71073538631 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 (71073538673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866750431 + ... + 866750512.

It is an arithmetic number, because the mean of its divisors is an integer number (18201759912).

Almost surely, 2^71073538663 is an apocalyptic number.

71073538663 is a deficient number, since it is larger than the sum of its proper divisors (1733500985).

71073538663 is a wasteful number, since it uses less digits than its factorization.

71073538663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1733500984.

The product of its (nonzero) digits is 1905120, while the sum is 49.

The spelling of 71073538663 in words is "seventy-one billion, seventy-three million, five hundred thirty-eight thousand, six hundred sixty-three".