406555221405 has 16 divisors (see below), whose sum is σ = 650705328000. Its totient is φ = 216757126848.

The previous prime is 406555221403. The next prime is 406555221433. The reversal of 406555221405 is 504122555604.

It is not a de Polignac number, because 406555221405 - 2¹ = 406555221403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406555221403) 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, 4473802 + ... + 4563771.

It is an arithmetic number, because the mean of its divisors is an integer number (40669083000).

Almost surely, 2^406555221405 is an apocalyptic number.

It is an amenable number.

406555221405 is a deficient number, since it is larger than the sum of its proper divisors (244150106595).

406555221405 is a wasteful number, since it uses less digits than its factorization.

406555221405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9040580.

The product of its (nonzero) digits is 240000, while the sum is 39.

The spelling of 406555221405 in words is "four hundred six billion, five hundred fifty-five million, two hundred twenty-one thousand, four hundred five".