1804991729472 has 588 divisors, whose sum is σ = 5627207491308. Its totient is φ = 573756825600.

The previous prime is 1804991729467. The next prime is 1804991729573. The reversal of 1804991729472 is 2749271994081.

1804991729472 is a `hidden beast` number, since 1 + 8 + 0 + 4 + 9 + 91 + 72 + 9 + 472 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 144357443136 + 1660634286336 = 379944^2 + 1288656^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 6423457972 + ... + 6423458252.

Almost surely, 2^{1804991729472} is an apocalyptic number.

1804991729472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1804991729472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2813603745654).

1804991729472 is an abundant number, since it is smaller than the sum of its proper divisors (3822215761836).

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

1804991729472 is an frugal number, since it uses more digits than its factorization.

1804991729472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 63.

The spelling of 1804991729472 in words is "one trillion, eight hundred four billion, nine hundred ninety-one million, seven hundred twenty-nine thousand, four hundred seventy-two".