55664644203 has 24 divisors (see below), whose sum is σ = 95930001360. Its totient is φ = 31808367360.

The previous prime is 55664644199. The next prime is 55664644213. The reversal of 55664644203 is 30244646655.

It is a happy number.

55664644203 is a `hidden beast` number, since 5 + 566 + 4 + 64 + 4 + 20 + 3 = 666.

It is not a de Polignac number, because 55664644203 - 2² = 55664644199 is a prime.

It is a super-2 number, since 2×55664644203² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55664644213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21035958 + ... + 21038603.

It is an arithmetic number, because the mean of its divisors is an integer number (3997083390).

Almost surely, 2^55664644203 is an apocalyptic number.

55664644203 is a deficient number, since it is larger than the sum of its proper divisors (40265357157).

55664644203 is a wasteful number, since it uses less digits than its factorization.

55664644203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42074584 (or 42074571 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 45.

The spelling of 55664644203 in words is "fifty-five billion, six hundred sixty-four million, six hundred forty-four thousand, two hundred three".