34065205561 has 4 divisors (see below), whose sum is σ = 34077636324. Its totient is φ = 34052774800.

The previous prime is 34065205543. The next prime is 34065205607. The reversal of 34065205561 is 16550256043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16550256043 = 4253 ⋅3891431.

It can be written as a sum of positive squares in 2 ways, for example, as 6137782336 + 27927423225 = 78344^2 + 167115^2 .

It is a cyclic number.

It is not a de Polignac number, because 34065205561 - 2⁹ = 34065205049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 34065205561.

It is not an unprimeable number, because it can be changed into a prime (34065005561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6211270 + ... + 6216751.

It is an arithmetic number, because the mean of its divisors is an integer number (8519409081).

Almost surely, 2^34065205561 is an apocalyptic number.

It is an amenable number.

34065205561 is a deficient number, since it is larger than the sum of its proper divisors (12430763).

34065205561 is a wasteful number, since it uses less digits than its factorization.

34065205561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12430762.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 34065205561 in words is "thirty-four billion, sixty-five million, two hundred five thousand, five hundred sixty-one".