85665201216 has 56 divisors (see below), whose sum is σ = 259035255360. Its totient is φ = 24475771392.

The previous prime is 85665201173. The next prime is 85665201283. The reversal of 85665201216 is 61210256658.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31868151 + ... + 31870838.

It is an arithmetic number, because the mean of its divisors is an integer number (4625629560).

Almost surely, 2^85665201216 is an apocalyptic number.

It is an amenable number.

85665201216 is an abundant number, since it is smaller than the sum of its proper divisors (173370054144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85665201216 is a wasteful number, since it uses less digits than its factorization.

85665201216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63739011 (or 63739001 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 85665201216 in words is "eighty-five billion, six hundred sixty-five million, two hundred one thousand, two hundred sixteen".