1945343836417 has 2 divisors, whose sum is σ = 1945343836418. Its totient is φ = 1945343836416.

The previous prime is 1945343836379. The next prime is 1945343836481. The reversal of 1945343836417 is 7146383435491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1211758438401 + 733585398016 = 1100799^2 + 856496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1945343836417 is a prime.

It is a super-2 number, since 2×1945343836417² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1945343836217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972671918208 + 972671918209.

It is an arithmetic number, because the mean of its divisors is an integer number (972671918209).

Almost surely, 2^{1945343836417} is an apocalyptic number.

It is an amenable number.

1945343836417 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945343836417 is an equidigital number, since it uses as much as digits as its factorization.

1945343836417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 58.

The spelling of 1945343836417 in words is "one trillion, nine hundred forty-five billion, three hundred forty-three million, eight hundred thirty-six thousand, four hundred seventeen".