245705542889 has 2 divisors, whose sum is σ = 245705542890. Its totient is φ = 245705542888.

The previous prime is 245705542799. The next prime is 245705542897. The reversal of 245705542889 is 988245507542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165555403225 + 80150139664 = 406885^2 + 283108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245705542889 is a prime.

It is not a weakly prime, because it can be changed into another prime (245705542289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122852771444 + 122852771445.

It is an arithmetic number, because the mean of its divisors is an integer number (122852771445).

Almost surely, 2^245705542889 is an apocalyptic number.

It is an amenable number.

245705542889 is a deficient number, since it is larger than the sum of its proper divisors (1).

245705542889 is an equidigital number, since it uses as much as digits as its factorization.

245705542889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256000, while the sum is 59.

The spelling of 245705542889 in words is "two hundred forty-five billion, seven hundred five million, five hundred forty-two thousand, eight hundred eighty-nine".