405575655 has 16 divisors (see below), whose sum is σ = 649319424. Its totient is φ = 216174240.

The previous prime is 405575633. The next prime is 405575657. The reversal of 405575655 is 556575504.

It is a happy number.

It is not a de Polignac number, because 405575655 - 2⁵ = 405575623 is a prime.

It is a super-2 number, since 2×405575655² = 328983223857358050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405575657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20082 + ... + 34848.

It is an arithmetic number, because the mean of its divisors is an integer number (40582464).

Almost surely, 2^405575655 is an apocalyptic number.

405575655 is a deficient number, since it is larger than the sum of its proper divisors (243743769).

405575655 is a wasteful number, since it uses less digits than its factorization.

405575655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16606.

The product of its (nonzero) digits is 525000, while the sum is 42.

The square root of 405575655 is about 20138.9089823655. The cubic root of 405575655 is about 740.2139964247.

The spelling of 405575655 in words is "four hundred five million, five hundred seventy-five thousand, six hundred fifty-five".