961535302561 has 2 divisors, whose sum is σ = 961535302562. Its totient is φ = 961535302560.

The previous prime is 961535302501. The next prime is 961535302571. The reversal of 961535302561 is 165203535169.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 616608139536 + 344927163025 = 785244^2 + 587305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-961535302561 is a prime.

It is not a weakly prime, because it can be changed into another prime (961535302501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480767651280 + 480767651281.

It is an arithmetic number, because the mean of its divisors is an integer number (480767651281).

Almost surely, 2^961535302561 is an apocalyptic number.

It is an amenable number.

961535302561 is a deficient number, since it is larger than the sum of its proper divisors (1).

961535302561 is an equidigital number, since it uses as much as digits as its factorization.

961535302561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729000, while the sum is 46.

The spelling of 961535302561 in words is "nine hundred sixty-one billion, five hundred thirty-five million, three hundred two thousand, five hundred sixty-one".