123543154345 has 8 divisors (see below), whose sum is σ = 159655768776. Its totient is φ = 91231867776.

The previous prime is 123543154261. The next prime is 123543154349. The reversal of 123543154345 is 543451345321.

It can be written as a sum of positive squares in 4 ways, for example, as 17911004224 + 105632150121 = 133832^2 + 325011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123543154345 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123543154298 and 123543154307.

It is not an unprimeable number, because it can be changed into a prime (123543154349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950331892 + ... + 950332021.

It is an arithmetic number, because the mean of its divisors is an integer number (19956971097).

Almost surely, 2^123543154345 is an apocalyptic number.

It is an amenable number.

123543154345 is a deficient number, since it is larger than the sum of its proper divisors (36112614431).

123543154345 is a wasteful number, since it uses less digits than its factorization.

123543154345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900663931.

The product of its digits is 432000, while the sum is 40.

Adding to 123543154345 its reverse (543451345321), we get a palindrome (666994499666).

The spelling of 123543154345 in words is "one hundred twenty-three billion, five hundred forty-three million, one hundred fifty-four thousand, three hundred forty-five".