2505749489 has 2 divisors, whose sum is σ = 2505749490. Its totient is φ = 2505749488.

The previous prime is 2505749453. The next prime is 2505749503. The reversal of 2505749489 is 9849475052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2023200400 + 482549089 = 44980^2 + 21967^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2505749489 is a prime.

It is a super-2 number, since 2×2505749489² = 12557561003247522242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2505749489.

It is not a weakly prime, because it can be changed into another prime (2505749429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252874744 + 1252874745.

It is an arithmetic number, because the mean of its divisors is an integer number (1252874745).

Almost surely, 2^2505749489 is an apocalyptic number.

It is an amenable number.

2505749489 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505749489 is an equidigital number, since it uses as much as digits as its factorization.

2505749489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 53.

The square root of 2505749489 is about 50057.4618713334. The cubic root of 2505749489 is about 1358.2484460014.

The spelling of 2505749489 in words is "two billion, five hundred five million, seven hundred forty-nine thousand, four hundred eighty-nine".