639339912407 has 8 divisors (see below), whose sum is σ = 731196480000. Its totient is φ = 547613918424.

The previous prime is 639339912401. The next prime is 639339912437. The reversal of 639339912407 is 704219933936.

It is a happy number.

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 639339912407 - 2²² = 639335718103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639339912401) 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, 32632907 + ... + 32652492.

It is an arithmetic number, because the mean of its divisors is an integer number (91399560000).

Almost surely, 2^639339912407 is an apocalyptic number.

639339912407 is a deficient number, since it is larger than the sum of its proper divisors (91856567593).

639339912407 is a wasteful number, since it uses less digits than its factorization.

639339912407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65286805.

The product of its (nonzero) digits is 6613488, while the sum is 56.

The spelling of 639339912407 in words is "six hundred thirty-nine billion, three hundred thirty-nine million, nine hundred twelve thousand, four hundred seven".