638944500627 has 6 divisors (see below), whose sum is σ = 922919834252. Its totient is φ = 425963000412.

The previous prime is 638944500611. The next prime is 638944500629. The reversal of 638944500627 is 726005449836.

638944500627 is a `hidden beast` number, since 6 + 3 + 8 + 9 + 4 + 4 + 5 + 0 + 0 + 627 = 666.

It is not a de Polignac number, because 638944500627 - 2⁴ = 638944500611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638944500629) 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 5 ways as a sum of consecutive naturals, for example, 35496916693 + ... + 35496916710.

Almost surely, 2^638944500627 is an apocalyptic number.

638944500627 is a deficient number, since it is larger than the sum of its proper divisors (283975333625).

638944500627 is a wasteful number, since it uses less digits than its factorization.

638944500627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70993833409 (or 70993833406 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 638944500627 in words is "six hundred thirty-eight billion, nine hundred forty-four million, five hundred thousand, six hundred twenty-seven".