34378440661 has 2 divisors, whose sum is σ = 34378440662. Its totient is φ = 34378440660.

The previous prime is 34378440623. The next prime is 34378440671. The reversal of 34378440661 is 16604487343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29114938161 + 5263502500 = 170631^2 + 72550^2 .

It is an emirp because it is prime and its reverse (16604487343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34378440661 - 2¹³ = 34378432469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34378440611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17189220330 + 17189220331.

It is an arithmetic number, because the mean of its divisors is an integer number (17189220331).

Almost surely, 2^34378440661 is an apocalyptic number.

It is an amenable number.

34378440661 is a deficient number, since it is larger than the sum of its proper divisors (1).

34378440661 is an equidigital number, since it uses as much as digits as its factorization.

34378440661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1161216, while the sum is 46.

The spelling of 34378440661 in words is "thirty-four billion, three hundred seventy-eight million, four hundred forty thousand, six hundred sixty-one".