123555343525 has 6 divisors (see below), whose sum is σ = 153208626002. Its totient is φ = 98844274800.

The previous prime is 123555343493. The next prime is 123555343537. The reversal of 123555343525 is 525343555321.

It can be written as a sum of positive squares in 3 ways, for example, as 7382074561 + 116173268964 = 85919^2 + 340842^2 .

It is not a de Polignac number, because 123555343525 - 2⁵ = 123555343493 is a prime.

It is a Duffinian number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 2471106846 + ... + 2471106895.

Almost surely, 2^123555343525 is an apocalyptic number.

It is an amenable number.

123555343525 is a deficient number, since it is larger than the sum of its proper divisors (29653282477).

123555343525 is an equidigital number, since it uses as much as digits as its factorization.

123555343525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4942213751 (or 4942213746 counting only the distinct ones).

The product of its digits is 1350000, while the sum is 43.

Adding to 123555343525 its reverse (525343555321), we get a palindrome (648898898846).

The spelling of 123555343525 in words is "one hundred twenty-three billion, five hundred fifty-five million, three hundred forty-three thousand, five hundred twenty-five".