71572865873 has 8 divisors (see below), whose sum is σ = 72306686760. Its totient is φ = 70840448640.

The previous prime is 71572865849. The next prime is 71572865887. The reversal of 71572865873 is 37856827517.

It can be written as a sum of positive squares in 4 ways, for example, as 15210782224 + 56362083649 = 123332^2 + 237407^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71572865873 - 2²⁶ = 71505757009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71572862873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248258 + ... + 452523.

It is an arithmetic number, because the mean of its divisors is an integer number (9038335845).

Almost surely, 2^71572865873 is an apocalyptic number.

It is an amenable number.

71572865873 is a deficient number, since it is larger than the sum of its proper divisors (733820887).

71572865873 is a wasteful number, since it uses less digits than its factorization.

71572865873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701827.

The product of its digits is 19756800, while the sum is 59.

The spelling of 71572865873 in words is "seventy-one billion, five hundred seventy-two million, eight hundred sixty-five thousand, eight hundred seventy-three".