71951304673 has 4 divisors (see below), whose sum is σ = 72265502740. Its totient is φ = 71637106608.

The previous prime is 71951304643. The next prime is 71951304683. The reversal of 71951304673 is 37640315917.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41141225889 + 30810078784 = 202833^2 + 175528^2 .

It is a cyclic number.

It is not a de Polignac number, because 71951304673 - 2⁵ = 71951304641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71951304613) 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, 157098690 + ... + 157099147.

It is an arithmetic number, because the mean of its divisors is an integer number (18066375685).

Almost surely, 2^71951304673 is an apocalyptic number.

It is an amenable number.

71951304673 is a deficient number, since it is larger than the sum of its proper divisors (314198067).

71951304673 is a wasteful number, since it uses less digits than its factorization.

71951304673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314198066.

The product of its (nonzero) digits is 476280, while the sum is 46.

The spelling of 71951304673 in words is "seventy-one billion, nine hundred fifty-one million, three hundred four thousand, six hundred seventy-three".