6961657605571 has 2 divisors, whose sum is σ = 6961657605572. Its totient is φ = 6961657605570.

The previous prime is 6961657605533. The next prime is 6961657605761. The reversal of 6961657605571 is 1755067561696.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6961657605571 is a prime.

It is not a weakly prime, because it can be changed into another prime (6961657608571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3480828802785 + 3480828802786.

It is an arithmetic number, because the mean of its divisors is an integer number (3480828802786).

Almost surely, 2^{6961657605571} is an apocalyptic number.

6961657605571 is a deficient number, since it is larger than the sum of its proper divisors (1).

6961657605571 is an equidigital number, since it uses as much as digits as its factorization.

6961657605571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71442000, while the sum is 64.

The spelling of 6961657605571 in words is "six trillion, nine hundred sixty-one billion, six hundred fifty-seven million, six hundred five thousand, five hundred seventy-one".