85555477777 has 32 divisors (see below), whose sum is σ = 112908211200. Its totient is φ = 62804808000.

The previous prime is 85555477769. The next prime is 85555477817. The reversal of 85555477777 is 77777455558.

It is not a de Polignac number, because 85555477777 - 2³ = 85555477769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85555477747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98527 + ... + 425227.

It is an arithmetic number, because the mean of its divisors is an integer number (3528381600).

Almost surely, 2^85555477777 is an apocalyptic number.

It is an amenable number.

85555477777 is a deficient number, since it is larger than the sum of its proper divisors (27352733423).

85555477777 is a wasteful number, since it uses less digits than its factorization.

85555477777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326917.

The product of its digits is 336140000, while the sum is 67.

The spelling of 85555477777 in words is "eighty-five billion, five hundred fifty-five million, four hundred seventy-seven thousand, seven hundred seventy-seven".