85855566959 has 4 divisors (see below), whose sum is σ = 87310746120. Its totient is φ = 84400387800.

The previous prime is 85855566919. The next prime is 85855566967. The reversal of 85855566959 is 95966555858.

It is a happy number.

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 85855566959 - 2¹⁶ = 85855501423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85855566892 and 85855566901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85855566919) 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, 727589492 + ... + 727589609.

It is an arithmetic number, because the mean of its divisors is an integer number (21827686530).

Almost surely, 2^85855566959 is an apocalyptic number.

85855566959 is a deficient number, since it is larger than the sum of its proper divisors (1455179161).

85855566959 is a wasteful number, since it uses less digits than its factorization.

85855566959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455179160.

The product of its digits is 583200000, while the sum is 71.

The spelling of 85855566959 in words is "eighty-five billion, eight hundred fifty-five million, five hundred sixty-six thousand, nine hundred fifty-nine".