639200063963 has 4 divisors (see below), whose sum is σ = 639223713480. Its totient is φ = 639176414448.

The previous prime is 639200063947. The next prime is 639200063987. The reversal of 639200063963 is 369360002936.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 639200063963 - 2⁴ = 639200063947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639200063923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11784170 + ... + 11838287.

It is an arithmetic number, because the mean of its divisors is an integer number (159805928370).

Almost surely, 2^639200063963 is an apocalyptic number.

639200063963 is a deficient number, since it is larger than the sum of its proper divisors (23649517).

639200063963 is a wasteful number, since it uses less digits than its factorization.

639200063963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23649516.

The product of its (nonzero) digits is 944784, while the sum is 47.

The spelling of 639200063963 in words is "six hundred thirty-nine billion, two hundred million, sixty-three thousand, nine hundred sixty-three".