325156600645661 has 2 divisors, whose sum is σ = 325156600645662. Its totient is φ = 325156600645660.

The previous prime is 325156600645637. The next prime is 325156600645693. The reversal of 325156600645661 is 166546006651523.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320031312157561 + 5125288488100 = 17889419^2 + 2263910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-325156600645661 is a prime.

It is a super-3 number, since 3×325156600645661³ (a number of 45 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 325156600645597 and 325156600645606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (325156600645361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162578300322830 + 162578300322831.

It is an arithmetic number, because the mean of its divisors is an integer number (162578300322831).

Almost surely, 2^{325156600645661} is an apocalyptic number.

It is an amenable number.

325156600645661 is a deficient number, since it is larger than the sum of its proper divisors (1).

325156600645661 is an equidigital number, since it uses as much as digits as its factorization.

325156600645661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328000, while the sum is 56.

The spelling of 325156600645661 in words is "three hundred twenty-five trillion, one hundred fifty-six billion, six hundred million, six hundred forty-five thousand, six hundred sixty-one".