638043098176 has 189 divisors, whose sum is σ = 1445945491263. Its totient is φ = 279124285440.

The previous prime is 638043098153. The next prime is 638043098197. The reversal of 638043098176 is 671890340836.

It is a happy number.

The square root of 638043098176 is 798776.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 252928526400 + 385114571776 = 502920^2 + 620576^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2038476196 + ... + 2038476508.

Almost surely, 2^638043098176 is an apocalyptic number.

638043098176 is the 798776-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 638043098176

638043098176 is an abundant number, since it is smaller than the sum of its proper divisors (807902393087).

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

638043098176 is an equidigital number, since it uses as much as digits as its factorization.

638043098176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 638043098176 in words is "six hundred thirty-eight billion, forty-three million, ninety-eight thousand, one hundred seventy-six".