85851215999 has 8 divisors (see below), whose sum is σ = 87689569728. Its totient is φ = 84013351200.

The previous prime is 85851215971. The next prime is 85851216019. The reversal of 85851215999 is 99951215858.

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 85851215999 - 2²⁰ = 85850167423 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 (85851215899) 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, 244349 + ... + 481049.

It is an arithmetic number, because the mean of its divisors is an integer number (10961196216).

Almost surely, 2^85851215999 is an apocalyptic number.

85851215999 is a deficient number, since it is larger than the sum of its proper divisors (1838353729).

85851215999 is a wasteful number, since it uses less digits than its factorization.

85851215999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244465.

The product of its digits is 11664000, while the sum is 62.

The spelling of 85851215999 in words is "eighty-five billion, eight hundred fifty-one million, two hundred fifteen thousand, nine hundred ninety-nine".