1638130999404 has 48 divisors (see below), whose sum is σ = 3857880936672. Its totient is φ = 540965870592.

The previous prime is 1638130999327. The next prime is 1638130999409. The reversal of 1638130999404 is 4049990318361.

It is not an unprimeable number, because it can be changed into a prime (1638130999409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2727882 + ... + 3273774.

It is an arithmetic number, because the mean of its divisors is an integer number (80372519514).

Almost surely, 2^{1638130999404} is an apocalyptic number.

It is an amenable number.

1638130999404 is an abundant number, since it is smaller than the sum of its proper divisors (2219749937268).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1638130999404 is a wasteful number, since it uses less digits than its factorization.

1638130999404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548226 (or 548224 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 57.

The spelling of 1638130999404 in words is "one trillion, six hundred thirty-eight billion, one hundred thirty million, nine hundred ninety-nine thousand, four hundred four".