405563541123 has 18 divisors (see below), whose sum is σ = 585568065036. Its totient is φ = 249568739472.

The previous prime is 405563541109. The next prime is 405563541139. The reversal of 405563541123 is 321145365504.

It is a happy number.

It is not a de Polignac number, because 405563541123 - 2⁴ = 405563541107 is a prime.

It is a super-2 number, since 2×405563541123² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (405563543123) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14325340 + ... + 14353622.

Almost surely, 2^405563541123 is an apocalyptic number.

405563541123 is a deficient number, since it is larger than the sum of its proper divisors (180004523913).

405563541123 is an frugal number, since it uses more digits than its factorization.

405563541123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56595 (or 28299 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 405563541123 in words is "four hundred five billion, five hundred sixty-three million, five hundred forty-one thousand, one hundred twenty-three".