2638530556 has 24 divisors (see below), whose sum is σ = 4719778560. Its totient is φ = 1290071472.

The previous prime is 2638530541. The next prime is 2638530581. The reversal of 2638530556 is 6550358362.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235735 + ... + 246673.

It is an arithmetic number, because the mean of its divisors is an integer number (196657440).

Almost surely, 2^2638530556 is an apocalyptic number.

It is an amenable number.

2638530556 is a deficient number, since it is larger than the sum of its proper divisors (2081248004).

2638530556 is a wasteful number, since it uses less digits than its factorization.

2638530556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12273 (or 12271 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The square root of 2638530556 is about 51366.6288167717. The cubic root of 2638530556 is about 1381.8281721498.

The spelling of 2638530556 in words is "two billion, six hundred thirty-eight million, five hundred thirty thousand, five hundred fifty-six".