505405345523 has 8 divisors (see below), whose sum is σ = 553507810800. Its totient is φ = 458620756128.

The previous prime is 505405345507. The next prime is 505405345561. The reversal of 505405345523 is 325543504505.

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

It is a cyclic number.

It is not a de Polignac number, because 505405345523 - 2⁴ = 505405345507 is a prime.

It is a super-2 number, since 2×505405345523² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505405345583) 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, 329468168 + ... + 329469701.

It is an arithmetic number, because the mean of its divisors is an integer number (69188476350).

Almost surely, 2^505405345523 is an apocalyptic number.

505405345523 is a deficient number, since it is larger than the sum of its proper divisors (48102465277).

505405345523 is a wasteful number, since it uses less digits than its factorization.

505405345523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658937941.

The product of its (nonzero) digits is 900000, while the sum is 41.

The spelling of 505405345523 in words is "five hundred five billion, four hundred five million, three hundred forty-five thousand, five hundred twenty-three".