85555477 has 4 divisors (see below), whose sum is σ = 97777696. Its totient is φ = 73333260.

The previous prime is 85555471. The next prime is 85555501. The reversal of 85555477 is 77455558.

85555477 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77455558 = 2 ⋅38727779.

It is not a de Polignac number, because 85555477 - 2¹⁵ = 85522709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85555471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6111099 + ... + 6111112.

It is an arithmetic number, because the mean of its divisors is an integer number (24444424).

Almost surely, 2^85555477 is an apocalyptic number.

It is an amenable number.

85555477 is a deficient number, since it is larger than the sum of its proper divisors (12222219).

85555477 is a wasteful number, since it uses less digits than its factorization.

85555477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12222218.

The product of its digits is 980000, while the sum is 46.

The square root of 85555477 is about 9249.6203705882. The cubic root of 85555477 is about 440.6386678992.

The spelling of 85555477 in words is "eighty-five million, five hundred fifty-five thousand, four hundred seventy-seven".