638592428064263 has 4 divisors (see below), whose sum is σ = 638592835646088. Its totient is φ = 638592020482440.

The previous prime is 638592428064257. The next prime is 638592428064329. The reversal of 638592428064263 is 362460824295836.

It is a happy number.

638592428064263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 638592428064263 - 2⁴ = 638592428064247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 638592428064193 and 638592428064202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638592428064203) 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, 201431633 + ... + 204577338.

It is an arithmetic number, because the mean of its divisors is an integer number (159648208911522).

Almost surely, 2^{638592428064263} is an apocalyptic number.

638592428064263 is a deficient number, since it is larger than the sum of its proper divisors (407581825).

638592428064263 is a wasteful number, since it uses less digits than its factorization.

638592428064263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407581824.

The product of its (nonzero) digits is 716636160, while the sum is 68.

The spelling of 638592428064263 in words is "six hundred thirty-eight trillion, five hundred ninety-two billion, four hundred twenty-eight million, sixty-four thousand, two hundred sixty-three".