11646563663650 has 12 divisors (see below), whose sum is σ = 21662608414482. Its totient is φ = 4658625465440.

The previous prime is 11646563663593. The next prime is 11646563663653. The reversal of 11646563663650 is 5636636564611.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4751323141009 + 6895240522641 = 2179753^2 + 2625879^2 .

It is not an unprimeable number, because it can be changed into a prime (11646563663653) 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 in 5 ways as a sum of consecutive naturals, for example, 116465636587 + ... + 116465636686.

Almost surely, 2^{11646563663650} is an apocalyptic number.

11646563663650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11646563663650 is a deficient number, since it is larger than the sum of its proper divisors (10016044750832).

11646563663650 is a wasteful number, since it uses less digits than its factorization.

11646563663650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232931273285 (or 232931273280 counting only the distinct ones).

The product of its (nonzero) digits is 41990400, while the sum is 58.

The spelling of 11646563663650 in words is "eleven trillion, six hundred forty-six billion, five hundred sixty-three million, six hundred sixty-three thousand, six hundred fifty".