9763987568644 has 81 divisors (see below), whose sum is σ = 17868301789653. Its totient is φ = 4668358572000.

The previous prime is 9763987568627. The next prime is 9763987568669. The reversal of 9763987568644 is 4468657893679.

The square root of 9763987568644 is 3124738.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 9381123631044 + 382863937600 = 3062862^2 + 618760^2 .

It is a super-2 number, since 2×9763987568644² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 19567109107 + ... + 19567109605.

Almost surely, 2^{9763987568644} is an apocalyptic number.

9763987568644 is the 3124738-th square number.

It is an amenable number.

9763987568644 is a deficient number, since it is larger than the sum of its proper divisors (8104314221009).

9763987568644 is an equidigital number, since it uses as much as digits as its factorization.

9763987568644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266 (or 633 counting only the distinct ones).

The product of its digits is 13168189440, while the sum is 82.

The spelling of 9763987568644 in words is "nine trillion, seven hundred sixty-three billion, nine hundred eighty-seven million, five hundred sixty-eight thousand, six hundred forty-four".