2505664571 has 2 divisors, whose sum is σ = 2505664572. Its totient is φ = 2505664570.

The previous prime is 2505664547. The next prime is 2505664573. The reversal of 2505664571 is 1754665052.

2505664571 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2505664571 is a prime.

It is a super-2 number, since 2×2505664571² = 12556709884729228082, which contains 22 as substring.

Together with 2505664573, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2505664573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252832285 + 1252832286.

It is an arithmetic number, because the mean of its divisors is an integer number (1252832286).

Almost surely, 2^2505664571 is an apocalyptic number.

2505664571 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505664571 is an equidigital number, since it uses as much as digits as its factorization.

2505664571 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252000, while the sum is 41.

The square root of 2505664571 is about 50056.6136589362. The cubic root of 2505664571 is about 1358.2331024825.

The spelling of 2505664571 in words is "two billion, five hundred five million, six hundred sixty-four thousand, five hundred seventy-one".