6546413641561 has 2 divisors, whose sum is σ = 6546413641562. Its totient is φ = 6546413641560.

The previous prime is 6546413641519. The next prime is 6546413641601. The reversal of 6546413641561 is 1651463146456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3329165160000 + 3217248481561 = 1824600^2 + 1793669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6546413641561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6546413641499 and 6546413641508.

It is not a weakly prime, because it can be changed into another prime (6546413641661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3273206820780 + 3273206820781.

It is an arithmetic number, because the mean of its divisors is an integer number (3273206820781).

Almost surely, 2^{6546413641561} is an apocalyptic number.

It is an amenable number.

6546413641561 is a deficient number, since it is larger than the sum of its proper divisors (1).

6546413641561 is an equidigital number, since it uses as much as digits as its factorization.

6546413641561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6220800, while the sum is 52.

The spelling of 6546413641561 in words is "six trillion, five hundred forty-six billion, four hundred thirteen million, six hundred forty-one thousand, five hundred sixty-one".