1783038304381 has 4 divisors (see below), whose sum is σ = 1786541327100. Its totient is φ = 1779535281664.

The previous prime is 1783038304303. The next prime is 1783038304403. The reversal of 1783038304381 is 1834038303871.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 634358089156 + 1148680215225 = 796466^2 + 1071765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1783038304381 - 2¹⁹ = 1783037780093 is a prime.

It is a super-2 number, since 2×1783038304381² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1783038394381) 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 3 ways as a sum of consecutive naturals, for example, 1751510596 + ... + 1751511613.

It is an arithmetic number, because the mean of its divisors is an integer number (446635331775).

Almost surely, 2^{1783038304381} is an apocalyptic number.

It is an amenable number.

1783038304381 is a deficient number, since it is larger than the sum of its proper divisors (3503022719).

1783038304381 is an equidigital number, since it uses as much as digits as its factorization.

1783038304381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3503022718.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The spelling of 1783038304381 in words is "one trillion, seven hundred eighty-three billion, thirty-eight million, three hundred four thousand, three hundred eighty-one".