55640810205 has 48 divisors (see below), whose sum is σ = 102166945920. Its totient is φ = 27934118784.

The previous prime is 55640810201. The next prime is 55640810207. The reversal of 55640810205 is 50201804655.

55640810205 is a `hidden beast` number, since 5 + 5 + 640 + 8 + 1 + 0 + 2 + 0 + 5 = 666.

It is not a de Polignac number, because 55640810205 - 2² = 55640810201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55640810205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55640810201) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73017 + ... + 341486.

It is an arithmetic number, because the mean of its divisors is an integer number (2128478040).

Almost surely, 2^55640810205 is an apocalyptic number.

It is an amenable number.

55640810205 is a deficient number, since it is larger than the sum of its proper divisors (46526135715).

55640810205 is a wasteful number, since it uses less digits than its factorization.

55640810205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414690 (or 414687 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 55640810205 in words is "fifty-five billion, six hundred forty million, eight hundred ten thousand, two hundred five".