9761811381556 has 18 divisors (see below), whose sum is σ = 18498343758342. Its totient is φ = 4505451406560.

The previous prime is 9761811381527. The next prime is 9761811381557. The reversal of 9761811381556 is 6551831181679.

It can be written as a sum of positive squares in 3 ways, for example, as 84013022500 + 9677798359056 = 289850^2 + 3110916^2 .

It is a super-2 number, since 2×9761811381556² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9761811381494 and 9761811381503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9761811381557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7220274015 + ... + 7220275366.

Almost surely, 2^{9761811381556} is an apocalyptic number.

It is an amenable number.

9761811381556 is a deficient number, since it is larger than the sum of its proper divisors (8736532376786).

9761811381556 is a wasteful number, since it uses less digits than its factorization.

9761811381556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14440549411 (or 14440549396 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 61.

The spelling of 9761811381556 in words is "nine trillion, seven hundred sixty-one billion, eight hundred eleven million, three hundred eighty-one thousand, five hundred fifty-six".