956533687649 has 2 divisors, whose sum is σ = 956533687650. Its totient is φ = 956533687648.

The previous prime is 956533687621. The next prime is 956533687729. The reversal of 956533687649 is 946786335659.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 489405180625 + 467128507024 = 699575^2 + 683468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-956533687649 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (956533687049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 478266843824 + 478266843825.

It is an arithmetic number, because the mean of its divisors is an integer number (478266843825).

Almost surely, 2^956533687649 is an apocalyptic number.

It is an amenable number.

956533687649 is a deficient number, since it is larger than the sum of its proper divisors (1).

956533687649 is an equidigital number, since it uses as much as digits as its factorization.

956533687649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 881798400, while the sum is 71.

The spelling of 956533687649 in words is "nine hundred fifty-six billion, five hundred thirty-three million, six hundred eighty-seven thousand, six hundred forty-nine".