85440866842 has 16 divisors (see below), whose sum is σ = 128558226600. Its totient is φ = 42588322560.

The previous prime is 85440866827. The next prime is 85440866879. The reversal of 85440866842 is 24866804458.

It can be written as a sum of positive squares in 4 ways, for example, as 79884804321 + 5556062521 = 282639^2 + 74539^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 826534 + ... + 924142.

Almost surely, 2^85440866842 is an apocalyptic number.

85440866842 is a deficient number, since it is larger than the sum of its proper divisors (43117359758).

85440866842 is a wasteful number, since it uses less digits than its factorization.

85440866842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98961.

The product of its (nonzero) digits is 11796480, while the sum is 55.

The spelling of 85440866842 in words is "eighty-five billion, four hundred forty million, eight hundred sixty-six thousand, eight hundred forty-two".