85534523257 has 4 divisors (see below), whose sum is σ = 85577746320. Its totient is φ = 85491300196.

The previous prime is 85534523219. The next prime is 85534523279. The reversal of 85534523257 is 75232543558.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75232543558 = 2 ⋅37616271779.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85534523257 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85534523257.

It is not an unprimeable number, because it can be changed into a prime (85534527257) 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, 21608563 + ... + 21612520.

It is an arithmetic number, because the mean of its divisors is an integer number (21394436580).

Almost surely, 2^85534523257 is an apocalyptic number.

It is an amenable number.

85534523257 is a deficient number, since it is larger than the sum of its proper divisors (43223063).

85534523257 is a wasteful number, since it uses less digits than its factorization.

85534523257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43223062.

The product of its digits is 5040000, while the sum is 49.

The spelling of 85534523257 in words is "eighty-five billion, five hundred thirty-four million, five hundred twenty-three thousand, two hundred fifty-seven".