327581053781 has 2 divisors, whose sum is σ = 327581053782. Its totient is φ = 327581053780.

The previous prime is 327581053727. The next prime is 327581053783. The reversal of 327581053781 is 187350185723.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197454920881 + 130126132900 = 444359^2 + 360730^2 .

It is a cyclic number.

It is not a de Polignac number, because 327581053781 - 2⁶ = 327581053717 is a prime.

It is a super-2 number, since 2×327581053781² (a number of 24 digits) contains 22 as substring.

Together with 327581053783, 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 (327581053783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163790526890 + 163790526891.

It is an arithmetic number, because the mean of its divisors is an integer number (163790526891).

Almost surely, 2^327581053781 is an apocalyptic number.

It is an amenable number.

327581053781 is a deficient number, since it is larger than the sum of its proper divisors (1).

327581053781 is an equidigital number, since it uses as much as digits as its factorization.

327581053781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 327581053781 in words is "three hundred twenty-seven billion, five hundred eighty-one million, fifty-three thousand, seven hundred eighty-one".