2506656263 has 4 divisors (see below), whose sum is σ = 2638585560. Its totient is φ = 2374726968.

The previous prime is 2506656259. The next prime is 2506656289. The reversal of 2506656263 is 3626566052.

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 2506656263 - 2² = 2506656259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2506656263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506656293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65964620 + ... + 65964657.

It is an arithmetic number, because the mean of its divisors is an integer number (659646390).

Almost surely, 2^2506656263 is an apocalyptic number.

2506656263 is a deficient number, since it is larger than the sum of its proper divisors (131929297).

2506656263 is a wasteful number, since it uses less digits than its factorization.

2506656263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131929296.

The product of its (nonzero) digits is 388800, while the sum is 41.

The square root of 2506656263 is about 50066.5183830472. The cubic root of 2506656263 is about 1358.4122660276.

The spelling of 2506656263 in words is "two billion, five hundred six million, six hundred fifty-six thousand, two hundred sixty-three".