6561768944053 has 2 divisors, whose sum is σ = 6561768944054. Its totient is φ = 6561768944052.

The previous prime is 6561768944011. The next prime is 6561768944117. The reversal of 6561768944053 is 3504498671656.

It is an a-pointer prime, because the next prime (6561768944117) can be obtained adding 6561768944053 to its sum of digits (64).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6561087577444 + 681366609 = 2561462^2 + 26103^2 .

It is a cyclic number.

It is not a de Polignac number, because 6561768944053 - 2¹³ = 6561768935861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6561768947053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3280884472026 + 3280884472027.

It is an arithmetic number, because the mean of its divisors is an integer number (3280884472027).

Almost surely, 2^{6561768944053} is an apocalyptic number.

It is an amenable number.

6561768944053 is a deficient number, since it is larger than the sum of its proper divisors (1).

6561768944053 is an equidigital number, since it uses as much as digits as its factorization.

6561768944053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 130636800, while the sum is 64.

The spelling of 6561768944053 in words is "six trillion, five hundred sixty-one billion, seven hundred sixty-eight million, nine hundred forty-four thousand, fifty-three".