638376530870 has 16 divisors (see below), whose sum is σ = 1237468352400. Its totient is φ = 235708257504.

The previous prime is 638376530837. The next prime is 638376530887. The reversal of 638376530870 is 78035673836.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2455294220 + ... + 2455294479.

It is an arithmetic number, because the mean of its divisors is an integer number (77341772025).

Almost surely, 2^638376530870 is an apocalyptic number.

638376530870 is a deficient number, since it is larger than the sum of its proper divisors (599091821530).

638376530870 is a wasteful number, since it uses less digits than its factorization.

638376530870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4910588719.

The product of its (nonzero) digits is 15240960, while the sum is 56.

The spelling of 638376530870 in words is "six hundred thirty-eight billion, three hundred seventy-six million, five hundred thirty thousand, eight hundred seventy".