55123123547 has 2 divisors, whose sum is σ = 55123123548. Its totient is φ = 55123123546.

The previous prime is 55123123493. The next prime is 55123123591. The reversal of 55123123547 is 74532132155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55123123547 - 2⁶ = 55123123483 is a prime.

It is a super-2 number, since 2×55123123547² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55123123547.

It is not a weakly prime, because it can be changed into another prime (55123123597) 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, 27561561773 + 27561561774.

It is an arithmetic number, because the mean of its divisors is an integer number (27561561774).

Almost surely, 2^55123123547 is an apocalyptic number.

55123123547 is a deficient number, since it is larger than the sum of its proper divisors (1).

55123123547 is an equidigital number, since it uses as much as digits as its factorization.

55123123547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 38.

The spelling of 55123123547 in words is "fifty-five billion, one hundred twenty-three million, one hundred twenty-three thousand, five hundred forty-seven".