85857865723 has 4 divisors (see below), whose sum is σ = 98123275120. Its totient is φ = 73592456328.

The previous prime is 85857865697. The next prime is 85857865729. The reversal of 85857865723 is 32756875858.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85857865723 - 2¹³ = 85857857531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85857865729) 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, 6132704688 + ... + 6132704701.

It is an arithmetic number, because the mean of its divisors is an integer number (24530818780).

Almost surely, 2^85857865723 is an apocalyptic number.

85857865723 is a deficient number, since it is larger than the sum of its proper divisors (12265409397).

85857865723 is a wasteful number, since it uses less digits than its factorization.

85857865723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12265409396.

The product of its digits is 112896000, while the sum is 64.

The spelling of 85857865723 in words is "eighty-five billion, eight hundred fifty-seven million, eight hundred sixty-five thousand, seven hundred twenty-three".