123354544513 has 8 divisors (see below), whose sum is σ = 125074131336. Its totient is φ = 121635763200.

The previous prime is 123354544451. The next prime is 123354544553. The reversal of 123354544513 is 315445453321.

It can be written as a sum of positive squares in 4 ways, for example, as 23923427584 + 99431116929 = 154672^2 + 315327^2 .

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-123354544513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123354544553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110373 + ... + 508813.

It is an arithmetic number, because the mean of its divisors is an integer number (15634266417).

Almost surely, 2^123354544513 is an apocalyptic number.

It is an amenable number.

123354544513 is a deficient number, since it is larger than the sum of its proper divisors (1719586823).

123354544513 is an equidigital number, since it uses as much as digits as its factorization.

123354544513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402755.

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

Adding to 123354544513 its reverse (315445453321), we get a palindrome (438799997834).

The spelling of 123354544513 in words is "one hundred twenty-three billion, three hundred fifty-four million, five hundred forty-four thousand, five hundred thirteen".