85642545705 has 32 divisors (see below), whose sum is σ = 138085807104. Its totient is φ = 45324390336.

The previous prime is 85642545679. The next prime is 85642545707. The reversal of 85642545705 is 50754524658.

It is not a de Polignac number, because 85642545705 - 2⁹ = 85642545193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85642545707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1441314 + ... + 1499556.

It is an arithmetic number, because the mean of its divisors is an integer number (4315181472).

Almost surely, 2^85642545705 is an apocalyptic number.

It is an amenable number.

85642545705 is a deficient number, since it is larger than the sum of its proper divisors (52443261399).

85642545705 is a wasteful number, since it uses less digits than its factorization.

85642545705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59005.

The product of its (nonzero) digits is 6720000, while the sum is 51.

The spelling of 85642545705 in words is "eighty-five billion, six hundred forty-two million, five hundred forty-five thousand, seven hundred five".