9661025351953 has 2 divisors, whose sum is σ = 9661025351954. Its totient is φ = 9661025351952.

The previous prime is 9661025351947. The next prime is 9661025351969. The reversal of 9661025351953 is 3591535201669.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5127289979904 + 4533735372049 = 2264352^2 + 2129257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9661025351953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9661025351894 and 9661025351903.

It is not a weakly prime, because it can be changed into another prime (9661025351933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4830512675976 + 4830512675977.

It is an arithmetic number, because the mean of its divisors is an integer number (4830512675977).

Almost surely, 2^{9661025351953} is an apocalyptic number.

It is an amenable number.

9661025351953 is a deficient number, since it is larger than the sum of its proper divisors (1).

9661025351953 is an equidigital number, since it uses as much as digits as its factorization.

9661025351953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6561000, while the sum is 55.

The spelling of 9661025351953 in words is "nine trillion, six hundred sixty-one billion, twenty-five million, three hundred fifty-one thousand, nine hundred fifty-three".