355204540403123 has 4 divisors (see below), whose sum is σ = 370648216072848. Its totient is φ = 339760864733400.

The previous prime is 355204540403117. The next prime is 355204540403177. The reversal of 355204540403123 is 321304045402553.

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

It is a cyclic number.

It is not a de Polignac number, because 355204540403123 - 2¹⁴ = 355204540386739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (355204540483123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7721837834828 + ... + 7721837834873.

It is an arithmetic number, because the mean of its divisors is an integer number (92662054018212).

Almost surely, 2^{355204540403123} is an apocalyptic number.

355204540403123 is a deficient number, since it is larger than the sum of its proper divisors (15443675669725).

355204540403123 is a wasteful number, since it uses less digits than its factorization.

355204540403123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15443675669724.

The product of its (nonzero) digits is 864000, while the sum is 41.

Adding to 355204540403123 its reverse (321304045402553), we get a palindrome (676508585805676).

The spelling of 355204540403123 in words is "three hundred fifty-five trillion, two hundred four billion, five hundred forty million, four hundred three thousand, one hundred twenty-three".