405123523420321 has 8 divisors (see below), whose sum is σ = 428970067205760. Its totient is φ = 381278729444928.

The previous prime is 405123523420313. The next prime is 405123523420391. The reversal of 405123523420321 is 123024325321504.

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

It is not a de Polignac number, because 405123523420321 - 2³ = 405123523420313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405123523420391) 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, 436975821 + ... + 437901946.

It is an arithmetic number, because the mean of its divisors is an integer number (53621258400720).

Almost surely, 2^{405123523420321} is an apocalyptic number.

It is an amenable number.

405123523420321 is a deficient number, since it is larger than the sum of its proper divisors (23846543785439).

405123523420321 is a wasteful number, since it uses less digits than its factorization.

405123523420321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874905023.

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 405123523420321 its reverse (123024325321504), we get a palindrome (528147848741825).

The spelling of 405123523420321 in words is "four hundred five trillion, one hundred twenty-three billion, five hundred twenty-three million, four hundred twenty thousand, three hundred twenty-one".