78485505585 has 16 divisors (see below), whose sum is σ = 125586795840. Its totient is φ = 41855607360.

The previous prime is 78485505541. The next prime is 78485505611. The reversal of 78485505585 is 58550558487.

It is not a de Polignac number, because 78485505585 - 2⁶ = 78485505521 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6886 + ... + 396255.

It is an arithmetic number, because the mean of its divisors is an integer number (7849174740).

Almost surely, 2^78485505585 is an apocalyptic number.

It is an amenable number.

78485505585 is a deficient number, since it is larger than the sum of its proper divisors (47101290255).

78485505585 is a wasteful number, since it uses less digits than its factorization.

78485505585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416128.

The product of its (nonzero) digits is 44800000, while the sum is 60.

The spelling of 78485505585 in words is "seventy-eight billion, four hundred eighty-five million, five hundred five thousand, five hundred eighty-five".