405564478323 has 16 divisors (see below), whose sum is σ = 581107317120. Its totient is φ = 250673740416.

The previous prime is 405564478307. The next prime is 405564478369. The reversal of 405564478323 is 323874465504.

It is not a de Polignac number, because 405564478323 - 2⁴ = 405564478307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (405564478373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59341693 + ... + 59348526.

It is an arithmetic number, because the mean of its divisors is an integer number (36319207320).

Almost surely, 2^405564478323 is an apocalyptic number.

405564478323 is a deficient number, since it is larger than the sum of its proper divisors (175542838797).

405564478323 is a wasteful number, since it uses less digits than its factorization.

405564478323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118690306.

The product of its (nonzero) digits is 9676800, while the sum is 51.

The spelling of 405564478323 in words is "four hundred five billion, five hundred sixty-four million, four hundred seventy-eight thousand, three hundred twenty-three".