2520445663 has 4 divisors (see below), whose sum is σ = 2535538320. Its totient is φ = 2505353008.

The previous prime is 2520445649. The next prime is 2520445673. The reversal of 2520445663 is 3665440252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2520445663 - 2²⁹ = 1983574751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520445673) 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, 7546078 + ... + 7546411.

It is an arithmetic number, because the mean of its divisors is an integer number (633884580).

Almost surely, 2^2520445663 is an apocalyptic number.

2520445663 is a deficient number, since it is larger than the sum of its proper divisors (15092657).

2520445663 is a wasteful number, since it uses less digits than its factorization.

2520445663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15092656.

The product of its (nonzero) digits is 172800, while the sum is 37.

The square root of 2520445663 is about 50204.0403055372. The cubic root of 2520445663 is about 1360.8986388882.

The spelling of 2520445663 in words is "two billion, five hundred twenty million, four hundred forty-five thousand, six hundred sixty-three".