638603252333 has 8 divisors (see below), whose sum is σ = 640651605048. Its totient is φ = 636557543424.

The previous prime is 638603252299. The next prime is 638603252351. The reversal of 638603252333 is 333252306836.

It can be written as a sum of positive squares in 4 ways, for example, as 148473043684 + 490130208649 = 385322^2 + 700093^2 .

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 638603252333 - 2²⁸ = 638334816877 is a prime.

It is a super-2 number, since 2×638603252333² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638603252393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176516 + ... + 1143837.

It is an arithmetic number, because the mean of its divisors is an integer number (80081450631).

Almost surely, 2^638603252333 is an apocalyptic number.

It is an amenable number.

638603252333 is a deficient number, since it is larger than the sum of its proper divisors (2048352715).

638603252333 is a wasteful number, since it uses less digits than its factorization.

638603252333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321903.

The product of its (nonzero) digits is 1399680, while the sum is 44.

The spelling of 638603252333 in words is "six hundred thirty-eight billion, six hundred three million, two hundred fifty-two thousand, three hundred thirty-three".