638374827372 has 24 divisors (see below), whose sum is σ = 1489703656896. Its totient is φ = 212768410128.

The previous prime is 638374827367. The next prime is 638374827373. The reversal of 638374827372 is 273728473836.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (638374827373) 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, 2785038 + ... + 3005525.

It is an arithmetic number, because the mean of its divisors is an integer number (62070985704).

Almost surely, 2^638374827372 is an apocalyptic number.

It is an amenable number.

638374827372 is an abundant number, since it is smaller than the sum of its proper divisors (851328829524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638374827372 is a wasteful number, since it uses less digits than its factorization.

638374827372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5799757 (or 5799755 counting only the distinct ones).

The product of its digits is 56899584, while the sum is 60.

The spelling of 638374827372 in words is "six hundred thirty-eight billion, three hundred seventy-four million, eight hundred twenty-seven thousand, three hundred seventy-two".