2520604649 has 4 divisors (see below), whose sum is σ = 2523031680. Its totient is φ = 2518177620.

The previous prime is 2520604633. The next prime is 2520604679. The reversal of 2520604649 is 9464060252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2520604649 - 2⁴ = 2520604633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520604609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1211957 + ... + 1214034.

It is an arithmetic number, because the mean of its divisors is an integer number (630757920).

Almost surely, 2^2520604649 is an apocalyptic number.

It is an amenable number.

2520604649 is a deficient number, since it is larger than the sum of its proper divisors (2427031).

2520604649 is a wasteful number, since it uses less digits than its factorization.

2520604649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427030.

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 2520604649 is about 50205.6236790262. The cubic root of 2520604649 is about 1360.9272527804.

The spelling of 2520604649 in words is "two billion, five hundred twenty million, six hundred four thousand, six hundred forty-nine".