1801831504720 has 60 divisors (see below), whose sum is σ = 4536297427356. Its totient is φ = 665291627520.

The previous prime is 1801831504709. The next prime is 1801831504763. The reversal of 1801831504720 is 274051381081.

It can be written as a sum of positive squares in 6 ways, for example, as 384950757136 + 1416880747584 = 620444^2 + 1190328^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66622261 + ... + 66649300.

Almost surely, 2^{1801831504720} is an apocalyptic number.

1801831504720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1801831504720 is an abundant number, since it is smaller than the sum of its proper divisors (2734465922636).

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

1801831504720 is a wasteful number, since it uses less digits than its factorization.

1801831504720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133271600 (or 133271581 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 1801831504720 in words is "one trillion, eight hundred one billion, eight hundred thirty-one million, five hundred four thousand, seven hundred twenty".