123405050545 has 16 divisors (see below), whose sum is σ = 169263993600. Its totient is φ = 84609215424.

The previous prime is 123405050539. The next prime is 123405050567. The reversal of 123405050545 is 545050504321.

It is a cyclic number.

It is not a de Polignac number, because 123405050545 - 2⁹ = 123405050033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123405050545.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 30684 + ... + 497746.

It is an arithmetic number, because the mean of its divisors is an integer number (10578999600).

Almost surely, 2^123405050545 is an apocalyptic number.

It is an amenable number.

123405050545 is a deficient number, since it is larger than the sum of its proper divisors (45858943055).

123405050545 is an equidigital number, since it uses as much as digits as its factorization.

123405050545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474624.

The product of its (nonzero) digits is 60000, while the sum is 34.

Adding to 123405050545 its reverse (545050504321), we get a palindrome (668455554866).

The spelling of 123405050545 in words is "one hundred twenty-three billion, four hundred five million, fifty thousand, five hundred forty-five".