638525150 has 12 divisors (see below), whose sum is σ = 1187656872. Its totient is φ = 255410040.

The previous prime is 638525137. The next prime is 638525171. The reversal of 638525150 is 51525836.

It is a self number, because there is not a number n which added to its sum of digits gives 638525150.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 6385202 + ... + 6385301.

It is an arithmetic number, because the mean of its divisors is an integer number (98971406).

Almost surely, 2^638525150 is an apocalyptic number.

638525150 is a deficient number, since it is larger than the sum of its proper divisors (549131722).

638525150 is a wasteful number, since it uses less digits than its factorization.

638525150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12770515 (or 12770510 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 638525150 is about 25269.0551861363. The cubic root of 638525150 is about 861.1113943653. Note that the first 3 decimals are identical.

The spelling of 638525150 in words is "six hundred thirty-eight million, five hundred twenty-five thousand, one hundred fifty".