2643505507 has 4 divisors (see below), whose sum is σ = 2644788960. Its totient is φ = 2642222056.

The previous prime is 2643505477. The next prime is 2643505517. The reversal of 2643505507 is 7055053462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7055053462 = 2 ⋅3527526731.

It is a cyclic number.

It is not a de Polignac number, because 2643505507 - 2¹⁹ = 2642981219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2643505517) 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, 638632 + ... + 642757.

It is an arithmetic number, because the mean of its divisors is an integer number (661197240).

Almost surely, 2^2643505507 is an apocalyptic number.

2643505507 is a deficient number, since it is larger than the sum of its proper divisors (1283453).

2643505507 is a wasteful number, since it uses less digits than its factorization.

2643505507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283452.

The product of its (nonzero) digits is 126000, while the sum is 37.

The square root of 2643505507 is about 51415.0319167459. The cubic root of 2643505507 is about 1382.6961061734.

Adding to 2643505507 its reverse (7055053462), we get a palindrome (9698558969).

The spelling of 2643505507 in words is "two billion, six hundred forty-three million, five hundred five thousand, five hundred seven".