55644644655 has 128 divisors (see below), whose sum is σ = 104762972160. Its totient is φ = 27984890880.

The previous prime is 55644644603. The next prime is 55644644663.

55644644655 is a `hidden beast` number, since 55 + 64 + 46 + 446 + 55 = 666.

55644644655 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 55644644655 - 2⁶ = 55644644591 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 34199952 + ... + 34201578.

It is an arithmetic number, because the mean of its divisors is an integer number (818460720).

Almost surely, 2^55644644655 is an apocalyptic number.

55644644655 is a deficient number, since it is larger than the sum of its proper divisors (49118327505).

55644644655 is a wasteful number, since it uses less digits than its factorization.

55644644655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1886 (or 1880 counting only the distinct ones).

The product of its digits is 34560000, while the sum is 54.

The spelling of 55644644655 in words is "fifty-five billion, six hundred forty-four million, six hundred forty-four thousand, six hundred fifty-five".