638298732096 has 63 divisors (see below), whose sum is σ = 1829623028961. Its totient is φ = 212759852544.

The previous prime is 638298732053. The next prime is 638298732143. The reversal of 638298732096 is 690237892836.

The square root of 638298732096 is 798936.

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

638298732096 is a `hidden beast` number, since 63 + 82 + 98 + 7 + 320 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20125394496 + 618173337600 = 141864^2 + 786240^2 .

It is a super-2 number, since 2×638298732096² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19157820 + ... + 19191108.

Almost surely, 2^638298732096 is an apocalyptic number.

638298732096 is the 798936-th square number.

It is an amenable number.

638298732096 is an abundant number, since it is smaller than the sum of its proper divisors (1191324296865).

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

638298732096 is an frugal number, since it uses more digits than its factorization.

638298732096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66596 (or 33294 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 638298732096 in words is "six hundred thirty-eight billion, two hundred ninety-eight million, seven hundred thirty-two thousand, ninety-six".