85865065435866 has 64 divisors (see below), whose sum is σ = 172709123319936. Its totient is φ = 28458868838400.

The previous prime is 85865065435781. The next prime is 85865065435873. The reversal of 85865065435866 is 66853456056858.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4646117346 + ... + 4646135826.

It is an arithmetic number, because the mean of its divisors is an integer number (2698580051874).

Almost surely, 2^{85865065435866} is an apocalyptic number.

85865065435866 is an abundant number, since it is smaller than the sum of its proper divisors (86844057884070).

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

85865065435866 is a wasteful number, since it uses less digits than its factorization.

85865065435866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22927.

The product of its (nonzero) digits is 4976640000, while the sum is 75.

The spelling of 85865065435866 in words is "eighty-five trillion, eight hundred sixty-five billion, sixty-five million, four hundred thirty-five thousand, eight hundred sixty-six".