855555547 has 48 divisors (see below), whose sum is σ = 1108287936. Its totient is φ = 646272000.

The previous prime is 855555527. The next prime is 855555557. The reversal of 855555547 is 745555558.

It is not a de Polignac number, because 855555547 - 2¹⁹ = 855031259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 855555547.

It is not an unprimeable number, because it can be changed into a prime (855555527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6244863 + ... + 6244999.

It is an arithmetic number, because the mean of its divisors is an integer number (23089332).

Almost surely, 2^855555547 is an apocalyptic number.

855555547 is a deficient number, since it is larger than the sum of its proper divisors (252732389).

855555547 is a wasteful number, since it uses less digits than its factorization.

855555547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 329 counting only the distinct ones).

The product of its digits is 3500000, while the sum is 49.

The square root of 855555547 is about 29249.8811450577. The cubic root of 855555547 is about 949.3275192789.

It can be divided in two parts, 8 and 55555547, that added together give a palindrome (55555555).

The spelling of 855555547 in words is "eight hundred fifty-five million, five hundred fifty-five thousand, five hundred forty-seven".