405656255 has 16 divisors (see below), whose sum is σ = 505509984. Its totient is φ = 312261120.

The previous prime is 405656249. The next prime is 405656269. The reversal of 405656255 is 552656504.

It is a happy number.

It is not a de Polignac number, because 405656255 - 2⁶ = 405656191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1412 + ... + 28518.

It is an arithmetic number, because the mean of its divisors is an integer number (31594374).

Almost surely, 2^405656255 is an apocalyptic number.

405656255 is a deficient number, since it is larger than the sum of its proper divisors (99853729).

405656255 is a wasteful number, since it uses less digits than its factorization.

405656255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27226.

The product of its (nonzero) digits is 180000, while the sum is 38.

The square root of 405656255 is about 20140.9099844074. The cubic root of 405656255 is about 740.2630273890.

The spelling of 405656255 in words is "four hundred five million, six hundred fifty-six thousand, two hundred fifty-five".