638403241070 has 32 divisors (see below), whose sum is σ = 1313314449408. Its totient is φ = 218876480928.

The previous prime is 638403241031. The next prime is 638403241079. The reversal of 638403241070 is 70142304836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638403241079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5744249 + ... + 5854331.

It is an arithmetic number, because the mean of its divisors is an integer number (41041076544).

Almost surely, 2^638403241070 is an apocalyptic number.

638403241070 is an abundant number, since it is smaller than the sum of its proper divisors (674911208338).

638403241070 is a wasteful number, since it uses less digits than its factorization.

638403241070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192944.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 638403241070 in words is "six hundred thirty-eight billion, four hundred three million, two hundred forty-one thousand, seventy".