71057528959 has 4 divisors (see below), whose sum is σ = 71058063520. Its totient is φ = 71056994400.

The previous prime is 71057528933. The next prime is 71057529001. The reversal of 71057528959 is 95982575017.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71057528959 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 (71057508959) 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, 104359 + ... + 391159.

It is an arithmetic number, because the mean of its divisors is an integer number (17764515880).

Almost surely, 2^71057528959 is an apocalyptic number.

71057528959 is a deficient number, since it is larger than the sum of its proper divisors (534561).

71057528959 is a wasteful number, since it uses less digits than its factorization.

71057528959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534560.

The product of its (nonzero) digits is 7938000, while the sum is 58.

The spelling of 71057528959 in words is "seventy-one billion, fifty-seven million, five hundred twenty-eight thousand, nine hundred fifty-nine".