1790138222209 has 2 divisors, whose sum is σ = 1790138222210. Its totient is φ = 1790138222208.

The previous prime is 1790138222143. The next prime is 1790138222251. The reversal of 1790138222209 is 9022228310971.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 907393415184 + 882744807025 = 952572^2 + 939545^2 .

It is a cyclic number.

It is not a de Polignac number, because 1790138222209 - 2¹³ = 1790138214017 is a prime.

It is a super-2 number, since 2×1790138222209² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1790138292209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 895069111104 + 895069111105.

It is an arithmetic number, because the mean of its divisors is an integer number (895069111105).

Almost surely, 2^{1790138222209} is an apocalyptic number.

It is an amenable number.

1790138222209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1790138222209 is an equidigital number, since it uses as much as digits as its factorization.

1790138222209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 1790138222209 in words is "one trillion, seven hundred ninety billion, one hundred thirty-eight million, two hundred twenty-two thousand, two hundred nine".