638344482402 has 16 divisors (see below), whose sum is σ = 1392751598112. Its totient is φ = 193437721920.

The previous prime is 638344482383. The next prime is 638344482409. The reversal of 638344482402 is 204284443836.

It is not an unprimeable number, because it can be changed into a prime (638344482409) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4835942983 + ... + 4835943114.

It is an arithmetic number, because the mean of its divisors is an integer number (87046974882).

Almost surely, 2^638344482402 is an apocalyptic number.

638344482402 is an abundant number, since it is smaller than the sum of its proper divisors (754407115710).

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

638344482402 is a wasteful number, since it uses less digits than its factorization.

638344482402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9671886113.

The product of its (nonzero) digits is 3538944, while the sum is 48.

The spelling of 638344482402 in words is "six hundred thirty-eight billion, three hundred forty-four million, four hundred eighty-two thousand, four hundred two".