320100251050661 has 2 divisors, whose sum is σ = 320100251050662. Its totient is φ = 320100251050660.

The previous prime is 320100251050549. The next prime is 320100251050663. The reversal of 320100251050661 is 166050152001023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 311279648048161 + 8820603002500 = 17643119^2 + 2969950^2 .

It is a cyclic number.

It is not a de Polignac number, because 320100251050661 - 2¹⁰ = 320100251049637 is a prime.

Together with 320100251050663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320100251050663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160050125525330 + 160050125525331.

It is an arithmetic number, because the mean of its divisors is an integer number (160050125525331).

Almost surely, 2^{320100251050661} is an apocalyptic number.

It is an amenable number.

320100251050661 is a deficient number, since it is larger than the sum of its proper divisors (1).

320100251050661 is an equidigital number, since it uses as much as digits as its factorization.

320100251050661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 320100251050661 in words is "three hundred twenty trillion, one hundred billion, two hundred fifty-one million, fifty thousand, six hundred sixty-one".