9963781841 has 6 divisors (see below), whose sum is σ = 10789184070. Its totient is φ = 9197336928.

The previous prime is 9963781819. The next prime is 9963781843. The reversal of 9963781841 is 1481873699.

It can be written as a sum of positive squares in 3 ways, for example, as 57760000 + 9906021841 = 7600^2 + 99529^2 .

It is not a de Polignac number, because 9963781841 - 2¹⁴ = 9963765457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9963781843) 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, 29478476 + ... + 29478813.

It is an arithmetic number, because the mean of its divisors is an integer number (1798197345).

Almost surely, 2^9963781841 is an apocalyptic number.

It is an amenable number.

9963781841 is a deficient number, since it is larger than the sum of its proper divisors (825402229).

9963781841 is a wasteful number, since it uses less digits than its factorization.

9963781841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58957315 (or 58957302 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 56.

The square root of 9963781841 is about 99818.7449380125. The cubic root of 9963781841 is about 2151.8305549924.

The spelling of 9963781841 in words is "nine billion, nine hundred sixty-three million, seven hundred eighty-one thousand, eight hundred forty-one".