855639554 has 32 divisors (see below), whose sum is σ = 1601596800. Its totient is φ = 333066240.

The previous prime is 855639553. The next prime is 855639557. The reversal of 855639554 is 455936558.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (855639553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255362 + ... + 258690.

It is an arithmetic number, because the mean of its divisors is an integer number (50049900).

Almost surely, 2^855639554 is an apocalyptic number.

855639554 is a deficient number, since it is larger than the sum of its proper divisors (745957246).

855639554 is a wasteful number, since it uses less digits than its factorization.

855639554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5018.

The product of its digits is 3240000, while the sum is 50.

The square root of 855639554 is about 29251.3171327378. The cubic root of 855639554 is about 949.3585897520.

The spelling of 855639554 in words is "eight hundred fifty-five million, six hundred thirty-nine thousand, five hundred fifty-four".