638410256122 has 8 divisors (see below), whose sum is σ = 958179024000. Its totient is φ = 319017248124.

The previous prime is 638410256089. The next prime is 638410256129. The reversal of 638410256122 is 221652014836.

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

It is not an unprimeable number, because it can be changed into a prime (638410256129) 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, 93935722 + ... + 93942517.

It is an arithmetic number, because the mean of its divisors is an integer number (119772378000).

Almost surely, 2^638410256122 is an apocalyptic number.

638410256122 is a deficient number, since it is larger than the sum of its proper divisors (319768767878).

638410256122 is a wasteful number, since it uses less digits than its factorization.

638410256122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187879940.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 638410256122 in words is "six hundred thirty-eight billion, four hundred ten million, two hundred fifty-six thousand, one hundred twenty-two".