1638751650404 has 24 divisors (see below), whose sum is σ = 3166218967968. Its totient is φ = 735912568640.

The previous prime is 1638751650337. The next prime is 1638751650413. The reversal of 1638751650404 is 4040561578361.

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, 224359937 + ... + 224367240.

It is an arithmetic number, because the mean of its divisors is an integer number (131925790332).

Almost surely, 2^{1638751650404} is an apocalyptic number.

It is an amenable number.

1638751650404 is a deficient number, since it is larger than the sum of its proper divisors (1527467317564).

1638751650404 is a wasteful number, since it uses less digits than its factorization.

1638751650404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448727275 (or 448727273 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 1638751650404 in words is "one trillion, six hundred thirty-eight billion, seven hundred fifty-one million, six hundred fifty thousand, four hundred four".