85724253647 has 4 divisors (see below), whose sum is σ = 85724864400. Its totient is φ = 85723642896.

The previous prime is 85724253619. The next prime is 85724253653. The reversal of 85724253647 is 74635242758.

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 not a de Polignac number, because 85724253647 - 2¹⁰ = 85724252623 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 (85724253947) 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, 22523 + ... + 414675.

It is an arithmetic number, because the mean of its divisors is an integer number (21431216100).

Almost surely, 2^85724253647 is an apocalyptic number.

85724253647 is a deficient number, since it is larger than the sum of its proper divisors (610753).

85724253647 is a wasteful number, since it uses less digits than its factorization.

85724253647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610752.

The product of its digits is 11289600, while the sum is 53.

The spelling of 85724253647 in words is "eighty-five billion, seven hundred twenty-four million, two hundred fifty-three thousand, six hundred forty-seven".