55123123493 has 2 divisors, whose sum is σ = 55123123494. Its totient is φ = 55123123492.

The previous prime is 55123123487. The next prime is 55123123547. The reversal of 55123123493 is 39432132155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45440169889 + 9682953604 = 213167^2 + 98402^2 .

It is a cyclic number.

It is not a de Polignac number, because 55123123493 - 2²⁸ = 54854688037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55123123403) 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 as a sum of consecutive naturals, namely, 27561561746 + 27561561747.

It is an arithmetic number, because the mean of its divisors is an integer number (27561561747).

Almost surely, 2^55123123493 is an apocalyptic number.

It is an amenable number.

55123123493 is a deficient number, since it is larger than the sum of its proper divisors (1).

55123123493 is an equidigital number, since it uses as much as digits as its factorization.

55123123493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 38.

The spelling of 55123123493 in words is "fifty-five billion, one hundred twenty-three million, one hundred twenty-three thousand, four hundred ninety-three".