405235204555 has 4 divisors (see below), whose sum is σ = 486282245472. Its totient is φ = 324188163640.

The previous prime is 405235204553. The next prime is 405235204567. The reversal of 405235204555 is 555402532504.

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

It is not a de Polignac number, because 405235204555 - 2¹ = 405235204553 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405235204553) 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, 40523520451 + ... + 40523520460.

It is an arithmetic number, because the mean of its divisors is an integer number (121570561368).

Almost surely, 2^405235204555 is an apocalyptic number.

405235204555 is a deficient number, since it is larger than the sum of its proper divisors (81047040917).

405235204555 is an equidigital number, since it uses as much as digits as its factorization.

405235204555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81047040916.

The product of its (nonzero) digits is 600000, while the sum is 40.

The spelling of 405235204555 in words is "four hundred five billion, two hundred thirty-five million, two hundred four thousand, five hundred fifty-five".