406555221407 has 8 divisors (see below), whose sum is σ = 407516343696. Its totient is φ = 405595225152.

The previous prime is 406555221403. The next prime is 406555221433. The reversal of 406555221407 is 704122555604.

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

It is a cyclic number.

It is not a de Polignac number, because 406555221407 - 2² = 406555221403 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 443648 + ... + 1004954.

It is an arithmetic number, because the mean of its divisors is an integer number (50939542962).

Almost surely, 2^406555221407 is an apocalyptic number.

406555221407 is a deficient number, since it is larger than the sum of its proper divisors (961122289).

406555221407 is an equidigital number, since it uses as much as digits as its factorization.

406555221407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563017.

The product of its (nonzero) digits is 336000, while the sum is 41.

The spelling of 406555221407 in words is "four hundred six billion, five hundred fifty-five million, two hundred twenty-one thousand, four hundred seven".