71953723433 has 4 divisors (see below), whose sum is σ = 74434886340. Its totient is φ = 69472560528.

The previous prime is 71953723423. The next prime is 71953723477. The reversal of 71953723433 is 33432735917.

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 14877168784 + 57076554649 = 121972^2 + 238907^2 .

It is a cyclic number.

It is not a de Polignac number, because 71953723433 - 2¹⁰ = 71953722409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71953723423) 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, 1240581410 + ... + 1240581467.

It is an arithmetic number, because the mean of its divisors is an integer number (18608721585).

Almost surely, 2^71953723433 is an apocalyptic number.

It is an amenable number.

71953723433 is a deficient number, since it is larger than the sum of its proper divisors (2481162907).

71953723433 is a wasteful number, since it uses less digits than its factorization.

71953723433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481162906.

The product of its digits is 1428840, while the sum is 47.

The spelling of 71953723433 in words is "seventy-one billion, nine hundred fifty-three million, seven hundred twenty-three thousand, four hundred thirty-three".