1774643974321 has 2 divisors, whose sum is σ = 1774643974322. Its totient is φ = 1774643974320.

The previous prime is 1774643974291. The next prime is 1774643974331. The reversal of 1774643974321 is 1234793464771.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1259694214321 + 514949760000 = 1122361^2 + 717600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1774643974321 - 2¹⁷ = 1774643843249 is a prime.

It is a super-2 number, since 2×1774643974321² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1774643974331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 887321987160 + 887321987161.

It is an arithmetic number, because the mean of its divisors is an integer number (887321987161).

Almost surely, 2^{1774643974321} is an apocalyptic number.

It is an amenable number.

1774643974321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1774643974321 is an equidigital number, since it uses as much as digits as its factorization.

1774643974321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21337344, while the sum is 58.

It can be divided in two parts, 1774643 and 974321, that added together give a square (2748964 = 1658²).

The spelling of 1774643974321 in words is "one trillion, seven hundred seventy-four billion, six hundred forty-three million, nine hundred seventy-four thousand, three hundred twenty-one".