638834097085 has 8 divisors (see below), whose sum is σ = 806948333280. Its totient is φ = 484168999824.

The previous prime is 638834097073. The next prime is 638834097103. The reversal of 638834097085 is 580790438836.

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 638834097085 - 2⁵ = 638834097053 is a prime.

It is a super-3 number, since 3×638834097085³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3362284627 + ... + 3362284816.

It is an arithmetic number, because the mean of its divisors is an integer number (100868541660).

Almost surely, 2^638834097085 is an apocalyptic number.

It is an amenable number.

638834097085 is a deficient number, since it is larger than the sum of its proper divisors (168114236195).

638834097085 is a wasteful number, since it uses less digits than its factorization.

638834097085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6724569467.

The product of its (nonzero) digits is 34836480, while the sum is 61.

The spelling of 638834097085 in words is "six hundred thirty-eight billion, eight hundred thirty-four million, ninety-seven thousand, eighty-five".