2124564655 has 4 divisors (see below), whose sum is σ = 2549477592. Its totient is φ = 1699651720.

The previous prime is 2124564653. The next prime is 2124564719. The reversal of 2124564655 is 5564654212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2124564655 - 2¹ = 2124564653 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2124564653) 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 3 ways as a sum of consecutive naturals, for example, 212456461 + ... + 212456470.

It is an arithmetic number, because the mean of its divisors is an integer number (637369398).

Almost surely, 2^2124564655 is an apocalyptic number.

2124564655 is a deficient number, since it is larger than the sum of its proper divisors (424912937).

2124564655 is an equidigital number, since it uses as much as digits as its factorization.

2124564655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424912936.

The product of its digits is 288000, while the sum is 40.

The square root of 2124564655 is about 46093.0000650858. Note that the first 4 decimals coincide. The cubic root of 2124564655 is about 1285.5529936793.

The spelling of 2124564655 in words is "two billion, one hundred twenty-four million, five hundred sixty-four thousand, six hundred fifty-five".