638660418053 has 8 divisors (see below), whose sum is σ = 729909089280. Its totient is φ = 547414614000.

The previous prime is 638660418029. The next prime is 638660418083. The reversal of 638660418053 is 350814066836.

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 638660418053 - 2²² = 638656223749 is a prime.

It is a super-3 number, since 3×638660418053³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 638660417992 and 638660418010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638660418083) 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, 216158 + ... + 1150671.

It is an arithmetic number, because the mean of its divisors is an integer number (91238636160).

Almost surely, 2^638660418053 is an apocalyptic number.

It is an amenable number.

638660418053 is a deficient number, since it is larger than the sum of its proper divisors (91248671227).

638660418053 is a wasteful number, since it uses less digits than its factorization.

638660418053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1433587.

The product of its (nonzero) digits is 2488320, while the sum is 50.

The spelling of 638660418053 in words is "six hundred thirty-eight billion, six hundred sixty million, four hundred eighteen thousand, fifty-three".