55540204123 has 2 divisors, whose sum is σ = 55540204124. Its totient is φ = 55540204122.

The previous prime is 55540204117. The next prime is 55540204151. The reversal of 55540204123 is 32140204555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55540204123 - 2⁵ = 55540204091 is a prime.

It is not a weakly prime, because it can be changed into another prime (55540204823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27770102061 + 27770102062.

It is an arithmetic number, because the mean of its divisors is an integer number (27770102062).

Almost surely, 2^55540204123 is an apocalyptic number.

55540204123 is a deficient number, since it is larger than the sum of its proper divisors (1).

55540204123 is an equidigital number, since it uses as much as digits as its factorization.

55540204123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 55540204123 its reverse (32140204555), we get a palindrome (87680408678).

The spelling of 55540204123 in words is "fifty-five billion, five hundred forty million, two hundred four thousand, one hundred twenty-three".