402648406444 has 6 divisors (see below), whose sum is σ = 704634711284. Its totient is φ = 201324203220.

The previous prime is 402648406397. The next prime is 402648406451. The reversal of 402648406444 is 444604846204.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 402648406394 and 402648406403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50331050802 + ... + 50331050809.

Almost surely, 2^402648406444 is an apocalyptic number.

It is an amenable number.

402648406444 is a deficient number, since it is larger than the sum of its proper divisors (301986304840).

402648406444 is a wasteful number, since it uses less digits than its factorization.

402648406444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100662101615 (or 100662101613 counting only the distinct ones).

The product of its (nonzero) digits is 2359296, while the sum is 46.

The spelling of 402648406444 in words is "four hundred two billion, six hundred forty-eight million, four hundred six thousand, four hundred forty-four".