123344775545 has 4 divisors (see below), whose sum is σ = 148013730660. Its totient is φ = 98675820432.

The previous prime is 123344775517. The next prime is 123344775551. The reversal of 123344775545 is 545577443321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34526470969 + 88818304576 = 185813^2 + 298024^2 .

It is a cyclic number.

It is not a de Polignac number, because 123344775545 - 2⁶ = 123344775481 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123344775493 and 123344775502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12334477550 + ... + 12334477559.

It is an arithmetic number, because the mean of its divisors is an integer number (37003432665).

Almost surely, 2^123344775545 is an apocalyptic number.

It is an amenable number.

123344775545 is a deficient number, since it is larger than the sum of its proper divisors (24668955115).

123344775545 is an equidigital number, since it uses as much as digits as its factorization.

123344775545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24668955114.

The product of its digits is 7056000, while the sum is 50.

The spelling of 123344775545 in words is "one hundred twenty-three billion, three hundred forty-four million, seven hundred seventy-five thousand, five hundred forty-five".