2563442638 has 8 divisors (see below), whose sum is σ = 3969201600. Its totient is φ = 1240375440.

The previous prime is 2563442599. The next prime is 2563442647. The reversal of 2563442638 is 8362443652.

It is a happy number.

2563442638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2563442594 and 2563442603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20672863 + ... + 20672986.

It is an arithmetic number, because the mean of its divisors is an integer number (496150200).

Almost surely, 2^2563442638 is an apocalyptic number.

2563442638 is a deficient number, since it is larger than the sum of its proper divisors (1405758962).

2563442638 is a wasteful number, since it uses less digits than its factorization.

2563442638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41345882.

The product of its digits is 829440, while the sum is 43.

The square root of 2563442638 is about 50630.4516867073. The cubic root of 2563442638 is about 1368.5936939364.

The spelling of 2563442638 in words is "two billion, five hundred sixty-three million, four hundred forty-two thousand, six hundred thirty-eight".