639391466463 has 8 divisors (see below), whose sum is σ = 853001715888. Its totient is φ = 426021097344.

The previous prime is 639391466423. The next prime is 639391466477. The reversal of 639391466463 is 364664193936.

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

It is not a de Polignac number, because 639391466463 - 2²⁸ = 639123031007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 639391466397 and 639391466406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639391466423) 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, 59963856 + ... + 59974517.

It is an arithmetic number, because the mean of its divisors is an integer number (106625214486).

Almost surely, 2^639391466463 is an apocalyptic number.

639391466463 is a deficient number, since it is larger than the sum of its proper divisors (213610249425).

639391466463 is a wasteful number, since it uses less digits than its factorization.

639391466463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119940153.

The product of its digits is 45349632, while the sum is 60.

The spelling of 639391466463 in words is "six hundred thirty-nine billion, three hundred ninety-one million, four hundred sixty-six thousand, four hundred sixty-three".