245604445109 has 2 divisors, whose sum is σ = 245604445110. Its totient is φ = 245604445108.

The previous prime is 245604445081. The next prime is 245604445139. The reversal of 245604445109 is 901544406542.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240909180625 + 4695264484 = 490825^2 + 68522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245604445109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245604445109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245604445139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122802222554 + 122802222555.

It is an arithmetic number, because the mean of its divisors is an integer number (122802222555).

Almost surely, 2^245604445109 is an apocalyptic number.

It is an amenable number.

245604445109 is a deficient number, since it is larger than the sum of its proper divisors (1).

245604445109 is an equidigital number, since it uses as much as digits as its factorization.

245604445109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 245604445109 in words is "two hundred forty-five billion, six hundred four million, four hundred forty-five thousand, one hundred nine".