405523432552523 has 4 divisors (see below), whose sum is σ = 405538924171800. Its totient is φ = 405507940933248.

The previous prime is 405523432552439. The next prime is 405523432552597. The reversal of 405523432552523 is 325255234325504.

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 405523432552523 - 2²⁰ = 405523431503947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405523432552723) 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, 7745770373 + ... + 7745822726.

It is an arithmetic number, because the mean of its divisors is an integer number (101384731042950).

Almost surely, 2^{405523432552523} is an apocalyptic number.

405523432552523 is a deficient number, since it is larger than the sum of its proper divisors (15491619277).

405523432552523 is a wasteful number, since it uses less digits than its factorization.

405523432552523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15491619276.

The product of its (nonzero) digits is 21600000, while the sum is 50.

The spelling of 405523432552523 in words is "four hundred five trillion, five hundred twenty-three billion, four hundred thirty-two million, five hundred fifty-two thousand, five hundred twenty-three".