245311053809 has 2 divisors, whose sum is σ = 245311053810. Its totient is φ = 245311053808.

The previous prime is 245311053791. The next prime is 245311053811. The reversal of 245311053809 is 908350113542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200717440225 + 44593613584 = 448015^2 + 211172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245311053809 is a prime.

Together with 245311053811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (245311053859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122655526904 + 122655526905.

It is an arithmetic number, because the mean of its divisors is an integer number (122655526905).

Almost surely, 2^245311053809 is an apocalyptic number.

It is an amenable number.

245311053809 is a deficient number, since it is larger than the sum of its proper divisors (1).

245311053809 is an equidigital number, since it uses as much as digits as its factorization.

245311053809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 245311053809 in words is "two hundred forty-five billion, three hundred eleven million, fifty-three thousand, eight hundred nine".