2734643245661 has 2 divisors, whose sum is σ = 2734643245662. Its totient is φ = 2734643245660.

The previous prime is 2734643245583. The next prime is 2734643245717. The reversal of 2734643245661 is 1665423464372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2251743337561 + 482899908100 = 1500581^2 + 694910^2 .

It is a cyclic number.

It is not a de Polignac number, because 2734643245661 - 2¹⁴ = 2734643229277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2734643245561) 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 as a sum of consecutive naturals, namely, 1367321622830 + 1367321622831.

It is an arithmetic number, because the mean of its divisors is an integer number (1367321622831).

Almost surely, 2^{2734643245661} is an apocalyptic number.

It is an amenable number.

2734643245661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2734643245661 is an equidigital number, since it uses as much as digits as its factorization.

2734643245661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17418240, while the sum is 53.

The spelling of 2734643245661 in words is "two trillion, seven hundred thirty-four billion, six hundred forty-three million, two hundred forty-five thousand, six hundred sixty-one".