1738731405109 has 2 divisors, whose sum is σ = 1738731405110. Its totient is φ = 1738731405108.

The previous prime is 1738731405107. The next prime is 1738731405113. The reversal of 1738731405109 is 9015041378371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 983066301009 + 755665104100 = 991497^2 + 869290^2 .

It is a cyclic number.

It is not a de Polignac number, because 1738731405109 - 2¹ = 1738731405107 is a prime.

It is a super-2 number, since 2×1738731405109² (a number of 25 digits) contains 22 as substring.

Together with 1738731405107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1738731405107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 869365702554 + 869365702555.

It is an arithmetic number, because the mean of its divisors is an integer number (869365702555).

Almost surely, 2^{1738731405109} is an apocalyptic number.

It is an amenable number.

1738731405109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1738731405109 is an equidigital number, since it uses as much as digits as its factorization.

1738731405109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 49.

The spelling of 1738731405109 in words is "one trillion, seven hundred thirty-eight billion, seven hundred thirty-one million, four hundred five thousand, one hundred nine".