405556105559 has 4 divisors (see below), whose sum is σ = 442424842440. Its totient is φ = 368687368680.

The previous prime is 405556105547. The next prime is 405556105573. The reversal of 405556105559 is 955501655504.

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 405556105559 - 2⁴ = 405556105543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405556105159) 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, 18434368424 + ... + 18434368445.

It is an arithmetic number, because the mean of its divisors is an integer number (110606210610).

Almost surely, 2^405556105559 is an apocalyptic number.

405556105559 is a deficient number, since it is larger than the sum of its proper divisors (36868736881).

405556105559 is a wasteful number, since it uses less digits than its factorization.

405556105559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36868736880.

The product of its (nonzero) digits is 3375000, while the sum is 50.

Subtracting 405556105559 from its reverse (955501655504), we obtain a palindrome (549945549945).

It can be divided in two parts, 405556 and 105559, that added together give a palindrome (511115).

The spelling of 405556105559 in words is "four hundred five billion, five hundred fifty-six million, one hundred five thousand, five hundred fifty-nine".