71572935939 has 4 divisors (see below), whose sum is σ = 95430581256. Its totient is φ = 47715290624.

The previous prime is 71572935923. The next prime is 71572935971. The reversal of 71572935939 is 93953927517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93953927517 = 3 ⋅31317975839.

It is a cyclic number.

It is not a de Polignac number, because 71572935939 - 2⁴ = 71572935923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71572935839) 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, 11928822654 + ... + 11928822659.

It is an arithmetic number, because the mean of its divisors is an integer number (23857645314).

Almost surely, 2^71572935939 is an apocalyptic number.

71572935939 is a deficient number, since it is larger than the sum of its proper divisors (23857645317).

71572935939 is a wasteful number, since it uses less digits than its factorization.

71572935939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23857645316.

The product of its digits is 16074450, while the sum is 60.

The spelling of 71572935939 in words is "seventy-one billion, five hundred seventy-two million, nine hundred thirty-five thousand, nine hundred thirty-nine".