9981264653 has 2 divisors, whose sum is σ = 9981264654. Its totient is φ = 9981264652.

The previous prime is 9981264617. The next prime is 9981264719. The reversal of 9981264653 is 3564621899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5208941929 + 4772322724 = 72173^2 + 69082^2 .

It is an emirp because it is prime and its reverse (3564621899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9981264653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9981264595 and 9981264604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9981264613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4990632326 + 4990632327.

It is an arithmetic number, because the mean of its divisors is an integer number (4990632327).

Almost surely, 2^9981264653 is an apocalyptic number.

It is an amenable number.

9981264653 is a deficient number, since it is larger than the sum of its proper divisors (1).

9981264653 is an equidigital number, since it uses as much as digits as its factorization.

9981264653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 53.

The square root of 9981264653 is about 99906.2793471962. The cubic root of 9981264653 is about 2153.0883795115.

The spelling of 9981264653 in words is "nine billion, nine hundred eighty-one million, two hundred sixty-four thousand, six hundred fifty-three".