638634334606 has 8 divisors (see below), whose sum is σ = 957959663904. Its totient is φ = 319314446640.

The previous prime is 638634334579. The next prime is 638634334607. The reversal of 638634334606 is 606433436836.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638634334607) 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, 1053030 + ... + 1544713.

It is an arithmetic number, because the mean of its divisors is an integer number (119744957988).

Almost surely, 2^638634334606 is an apocalyptic number.

638634334606 is a deficient number, since it is larger than the sum of its proper divisors (319325329298).

638634334606 is a wasteful number, since it uses less digits than its factorization.

638634334606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720666.

The product of its (nonzero) digits is 13436928, while the sum is 52.

The spelling of 638634334606 in words is "six hundred thirty-eight billion, six hundred thirty-four million, three hundred thirty-four thousand, six hundred six".