55856633665855 has 16 divisors (see below), whose sum is σ = 73123827331104. Its totient is φ = 40621664087680.

The previous prime is 55856633665817. The next prime is 55856633665867.

It is a happy number.

55856633665855 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55856633665855 - 2⁷ = 55856633665727 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15096424 + ... + 18428653.

It is an arithmetic number, because the mean of its divisors is an integer number (4570239208194).

Almost surely, 2^{55856633665855} is an apocalyptic number.

55856633665855 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55856633665855 is a deficient number, since it is larger than the sum of its proper divisors (17267193665249).

55856633665855 is a wasteful number, since it uses less digits than its factorization.

55856633665855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33555386.

The product of its digits is 11664000000, while the sum is 76.

The spelling of 55856633665855 in words is "fifty-five trillion, eight hundred fifty-six billion, six hundred thirty-three million, six hundred sixty-five thousand, eight hundred fifty-five".