2603648638 has 16 divisors (see below), whose sum is σ = 3981039840. Its totient is φ = 1276658656.

The previous prime is 2603648629. The next prime is 2603648687. The reversal of 2603648638 is 8368463062.

2603648638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 291231 + ... + 300037.

It is an arithmetic number, because the mean of its divisors is an integer number (248814990).

Almost surely, 2^2603648638 is an apocalyptic number.

2603648638 is a deficient number, since it is larger than the sum of its proper divisors (1377391202).

2603648638 is a wasteful number, since it uses less digits than its factorization.

2603648638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11651.

The product of its (nonzero) digits is 995328, while the sum is 46.

The square root of 2603648638 is about 51025.9604319213. The cubic root of 2603648638 is about 1375.7117880313.

The spelling of 2603648638 in words is "two billion, six hundred three million, six hundred forty-eight thousand, six hundred thirty-eight".