1804639075938 has 128 divisors (see below), whose sum is σ = 4180044960000. Its totient is φ = 576610721280.

The previous prime is 1804639075933. The next prime is 1804639075957. The reversal of 1804639075938 is 8395709364081.

1804639075938 is a `hidden beast` number, since 1 + 8 + 0 + 4 + 6 + 39 + 0 + 7 + 593 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (1804639075933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 396708888 + ... + 396713436.

It is an arithmetic number, because the mean of its divisors is an integer number (32656601250).

Almost surely, 2^{1804639075938} is an apocalyptic number.

1804639075938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1804639075938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2090022480000).

1804639075938 is an abundant number, since it is smaller than the sum of its proper divisors (2375405884062).

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

1804639075938 is a wasteful number, since it uses less digits than its factorization.

1804639075938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7697 (or 7691 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 1804639075938 in words is "one trillion, eight hundred four billion, six hundred thirty-nine million, seventy-five thousand, nine hundred thirty-eight".