1638118831004 has 12 divisors (see below), whose sum is σ = 2869735107624. Its totient is φ = 818194514544.

The previous prime is 1638118830973. The next prime is 1638118831049. The reversal of 1638118831004 is 4001388118361.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216220979 + ... + 216228554.

It is an arithmetic number, because the mean of its divisors is an integer number (239144592302).

Almost surely, 2^{1638118831004} is an apocalyptic number.

It is an amenable number.

1638118831004 is a deficient number, since it is larger than the sum of its proper divisors (1231616276620).

1638118831004 is a wasteful number, since it uses less digits than its factorization.

1638118831004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432450484 (or 432450482 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The spelling of 1638118831004 in words is "one trillion, six hundred thirty-eight billion, one hundred eighteen million, eight hundred thirty-one thousand, four".