405504655 has 8 divisors (see below), whose sum is σ = 515229552. Its totient is φ = 305321088.

The previous prime is 405504647. The next prime is 405504661. The reversal of 405504655 is 556405504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 405504655 - 2³ = 405504647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 405504655.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2385237 + ... + 2385406.

It is an arithmetic number, because the mean of its divisors is an integer number (64403694).

Almost surely, 2^405504655 is an apocalyptic number.

405504655 is a deficient number, since it is larger than the sum of its proper divisors (109724897).

405504655 is a wasteful number, since it uses less digits than its factorization.

405504655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4770665.

The product of its (nonzero) digits is 60000, while the sum is 34.

The square root of 405504655 is about 20137.1461483498. The cubic root of 405504655 is about 740.1707999950.

The spelling of 405504655 in words is "four hundred five million, five hundred four thousand, six hundred fifty-five".