9764972557 has 2 divisors, whose sum is σ = 9764972558. Its totient is φ = 9764972556.

The previous prime is 9764972527. The next prime is 9764972563. The reversal of 9764972557 is 7552794679.

9764972557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9622432836 + 142539721 = 98094^2 + 11939^2 .

It is an emirp because it is prime and its reverse (7552794679) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9764972557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9764972495 and 9764972504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9764972527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4882486278 + 4882486279.

It is an arithmetic number, because the mean of its divisors is an integer number (4882486279).

Almost surely, 2^9764972557 is an apocalyptic number.

It is an amenable number.

9764972557 is a deficient number, since it is larger than the sum of its proper divisors (1).

9764972557 is an equidigital number, since it uses as much as digits as its factorization.

9764972557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33339600, while the sum is 61.

The square root of 9764972557 is about 98817.8756956453. The cubic root of 9764972557 is about 2137.4223307140.

The spelling of 9764972557 in words is "nine billion, seven hundred sixty-four million, nine hundred seventy-two thousand, five hundred fifty-seven".