9656917447761 has 12 divisors (see below), whose sum is σ = 13954118825088. Its totient is φ = 6435527395704.

The previous prime is 9656917447753. The next prime is 9656917447787. The reversal of 9656917447761 is 1677447196569.

9656917447761 is a `hidden beast` number, since 9 + 6 + 5 + 6 + 91 + 7 + 4 + 477 + 61 = 666.

It is not a de Polignac number, because 9656917447761 - 2³ = 9656917447753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9656917447761.

It is not an unprimeable number, because it can be changed into a prime (9656917447711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201438825 + ... + 201486758.

It is an arithmetic number, because the mean of its divisors is an integer number (1162843235424).

Almost surely, 2^{9656917447761} is an apocalyptic number.

It is an amenable number.

9656917447761 is a deficient number, since it is larger than the sum of its proper divisors (4297201377327).

9656917447761 is a wasteful number, since it uses less digits than its factorization.

9656917447761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402928252 (or 402928249 counting only the distinct ones).

The product of its digits is 480090240, while the sum is 72.

The spelling of 9656917447761 in words is "nine trillion, six hundred fifty-six billion, nine hundred seventeen million, four hundred forty-seven thousand, seven hundred sixty-one".