638057529426 has 16 divisors (see below), whose sum is σ = 1276123116384. Its totient is φ = 212684500224.

The previous prime is 638057529413. The next prime is 638057529469. The reversal of 638057529426 is 624925750836.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1327666 + ... + 1743218.

It is an arithmetic number, because the mean of its divisors is an integer number (79757694774).

Almost surely, 2^638057529426 is an apocalyptic number.

638057529426 is an abundant number, since it is smaller than the sum of its proper divisors (638065586958).

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

638057529426 is a wasteful number, since it uses less digits than its factorization.

638057529426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671465.

The product of its (nonzero) digits is 21772800, while the sum is 57.

The spelling of 638057529426 in words is "six hundred thirty-eight billion, fifty-seven million, five hundred twenty-nine thousand, four hundred twenty-six".