71803538961 has 16 divisors (see below), whose sum is σ = 119361727488. Its totient is φ = 37300539600.

The previous prime is 71803538953. The next prime is 71803538999. The reversal of 71803538961 is 16983530817.

It is not a de Polignac number, because 71803538961 - 2³ = 71803538953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71803539961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155418685 + ... + 155419146.

It is an arithmetic number, because the mean of its divisors is an integer number (7460107968).

Almost surely, 2^71803538961 is an apocalyptic number.

It is an amenable number.

71803538961 is a deficient number, since it is larger than the sum of its proper divisors (47558188527).

71803538961 is a wasteful number, since it uses less digits than its factorization.

71803538961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310837852.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The spelling of 71803538961 in words is "seventy-one billion, eight hundred three million, five hundred thirty-eight thousand, nine hundred sixty-one".