405442340005 has 8 divisors (see below), whose sum is σ = 503307732600. Its totient is φ = 313169255616.

The previous prime is 405442339969. The next prime is 405442340011. The reversal of 405442340005 is 500043244504.

It can be written as a sum of positive squares in 4 ways, for example, as 28708164 + 405413631841 = 5358^2 + 636721^2 .

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 405442340005 - 2¹¹ = 405442337957 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1398076890 + ... + 1398077179.

It is an arithmetic number, because the mean of its divisors is an integer number (62913466575).

Almost surely, 2^405442340005 is an apocalyptic number.

It is an amenable number.

405442340005 is a deficient number, since it is larger than the sum of its proper divisors (97865392595).

405442340005 is a wasteful number, since it uses less digits than its factorization.

405442340005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2796154103.

The product of its (nonzero) digits is 38400, while the sum is 31.

Adding to 405442340005 its reverse (500043244504), we get a palindrome (905485584509).

The spelling of 405442340005 in words is "four hundred five billion, four hundred forty-two million, three hundred forty thousand, five".