2545631269 has 2 divisors, whose sum is σ = 2545631270. Its totient is φ = 2545631268.

The previous prime is 2545631189. The next prime is 2545631327. The reversal of 2545631269 is 9621365452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2039606244 + 506025025 = 45162^2 + 22495^2 .

It is a cyclic number.

It is not a de Polignac number, because 2545631269 - 2¹¹ = 2545629221 is a prime.

It is a super-2 number, since 2×2545631269² = 12960477115421100722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2545631369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1272815634 + 1272815635.

It is an arithmetic number, because the mean of its divisors is an integer number (1272815635).

Almost surely, 2^2545631269 is an apocalyptic number.

It is an amenable number.

2545631269 is a deficient number, since it is larger than the sum of its proper divisors (1).

2545631269 is an equidigital number, since it uses as much as digits as its factorization.

2545631269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 43.

The square root of 2545631269 is about 50454.2492660430. The cubic root of 2545631269 is about 1365.4165597025.

The spelling of 2545631269 in words is "two billion, five hundred forty-five million, six hundred thirty-one thousand, two hundred sixty-nine".