639784575411 has 8 divisors (see below), whose sum is σ = 853050046464. Its totient is φ = 426521077320.

The previous prime is 639784575389. The next prime is 639784575461. The reversal of 639784575411 is 114575487936.

639784575411 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 639784575411 - 2²⁷ = 639650357683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (639784575461) 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, 626646 + ... + 1293156.

It is an arithmetic number, because the mean of its divisors is an integer number (106631255808).

Almost surely, 2^639784575411 is an apocalyptic number.

639784575411 is a deficient number, since it is larger than the sum of its proper divisors (213265471053).

639784575411 is a wasteful number, since it uses less digits than its factorization.

639784575411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986481.

The product of its digits is 25401600, while the sum is 60.

The spelling of 639784575411 in words is "six hundred thirty-nine billion, seven hundred eighty-four million, five hundred seventy-five thousand, four hundred eleven".