639711377513 has 8 divisors (see below), whose sum is σ = 689867575488. Its totient is φ = 589690555344.

The previous prime is 639711377489. The next prime is 639711377579. The reversal of 639711377513 is 315773117936.

It is a happy number.

639711377513 is digitally balanced in base 2, because in such base 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 a cyclic number.

It is not a de Polignac number, because 639711377513 - 2⁶ = 639711377449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (639711377593) 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, 33834131 + ... + 33853032.

It is an arithmetic number, because the mean of its divisors is an integer number (86233446936).

Almost surely, 2^639711377513 is an apocalyptic number.

It is an amenable number.

639711377513 is a deficient number, since it is larger than the sum of its proper divisors (50156197975).

639711377513 is a wasteful number, since it uses less digits than its factorization.

639711377513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67687903.

The product of its digits is 2500470, while the sum is 53.

The spelling of 639711377513 in words is "six hundred thirty-nine billion, seven hundred eleven million, three hundred seventy-seven thousand, five hundred thirteen".