638125763 has 8 divisors (see below), whose sum is σ = 713116656. Its totient is φ = 565964800.

The previous prime is 638125757. The next prime is 638125783. The reversal of 638125763 is 367521836.

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

It is a cyclic number.

It is not a de Polignac number, because 638125763 - 2¹² = 638121667 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

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 638125763.

It is not an unprimeable number, because it can be changed into a prime (638125703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 707006 + ... + 707907.

It is an arithmetic number, because the mean of its divisors is an integer number (89139582).

Almost surely, 2^638125763 is an apocalyptic number.

638125763 is a deficient number, since it is larger than the sum of its proper divisors (74990893).

638125763 is a wasteful number, since it uses less digits than its factorization.

638125763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414965.

The product of its digits is 181440, while the sum is 41.

The square root of 638125763 is about 25261.1512603840. The cubic root of 638125763 is about 860.9318199058.

The spelling of 638125763 in words is "six hundred thirty-eight million, one hundred twenty-five thousand, seven hundred sixty-three".