2545245709 has 2 divisors, whose sum is σ = 2545245710. Its totient is φ = 2545245708.

The previous prime is 2545245641. The next prime is 2545245721. The reversal of 2545245709 is 9075425452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2262904900 + 282340809 = 47570^2 + 16803^2 .

It is a cyclic number.

It is not a de Polignac number, because 2545245709 - 2²⁵ = 2511691277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2545245509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272622854 + 1272622855.

It is an arithmetic number, because the mean of its divisors is an integer number (1272622855).

Almost surely, 2^2545245709 is an apocalyptic number.

It is an amenable number.

2545245709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2545245709 is an equidigital number, since it uses as much as digits as its factorization.

2545245709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504000, while the sum is 43.

The square root of 2545245709 is about 50450.4282340596. The cubic root of 2545245709 is about 1365.3476211258.

The spelling of 2545245709 in words is "two billion, five hundred forty-five million, two hundred forty-five thousand, seven hundred nine".