405204415442 has 4 divisors (see below), whose sum is σ = 607806623166. Its totient is φ = 202602207720.

The previous prime is 405204415397. The next prime is 405204415481. The reversal of 405204415442 is 244514402504.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 262124544361 + 143079871081 = 511981^2 + 378259^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101301103859 + ... + 101301103862.

Almost surely, 2^405204415442 is an apocalyptic number.

405204415442 is a deficient number, since it is larger than the sum of its proper divisors (202602207724).

405204415442 is a wasteful number, since it uses less digits than its factorization.

405204415442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202602207723.

The product of its (nonzero) digits is 102400, while the sum is 35.

Adding to 405204415442 its reverse (244514402504), we get a palindrome (649718817946).

The spelling of 405204415442 in words is "four hundred five billion, two hundred four million, four hundred fifteen thousand, four hundred forty-two".