405523353145 has 4 divisors (see below), whose sum is σ = 486628023780. Its totient is φ = 324418682512.

The previous prime is 405523353143. The next prime is 405523353211. The reversal of 405523353145 is 541353325504.

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

It can be written as a sum of positive squares in 2 ways, for example, as 65886162489 + 339637190656 = 256683^2 + 582784^2 .

It is a cyclic number.

It is not a de Polignac number, because 405523353145 - 2¹ = 405523353143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405523353098 and 405523353107.

It is not an unprimeable number, because it can be changed into a prime (405523353143) 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, 40552335310 + ... + 40552335319.

It is an arithmetic number, because the mean of its divisors is an integer number (121657005945).

Almost surely, 2^405523353145 is an apocalyptic number.

It is an amenable number.

405523353145 is a deficient number, since it is larger than the sum of its proper divisors (81104670635).

405523353145 is an equidigital number, since it uses as much as digits as its factorization.

405523353145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81104670634.

The product of its (nonzero) digits is 540000, while the sum is 40.

Adding to 405523353145 its reverse (541353325504), we get a palindrome (946876678649).

The spelling of 405523353145 in words is "four hundred five billion, five hundred twenty-three million, three hundred fifty-three thousand, one hundred forty-five".