55861016855 has 16 divisors (see below), whose sum is σ = 76759928640. Its totient is φ = 38229430272.

The previous prime is 55861016851. The next prime is 55861016863.

It is a happy number.

55861016855 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 55861016855 - 2² = 55861016851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55861016851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1549994 + ... + 1585623.

It is an arithmetic number, because the mean of its divisors is an integer number (4797495540).

Almost surely, 2^55861016855 is an apocalyptic number.

55861016855 is a deficient number, since it is larger than the sum of its proper divisors (20898911785).

55861016855 is a wasteful number, since it uses less digits than its factorization.

55861016855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136138.

The product of its (nonzero) digits is 1440000, while the sum is 50.

The spelling of 55861016855 in words is "fifty-five billion, eight hundred sixty-one million, sixteen thousand, eight hundred fifty-five".