638421541150 has 12 divisors (see below), whose sum is σ = 1187464066632. Its totient is φ = 255368616440.

The previous prime is 638421541123. The next prime is 638421541159. The reversal of 638421541150 is 51145124836.

It is a super-2 number, since 2×638421541150² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638421541159) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6384215362 + ... + 6384215461.

It is an arithmetic number, because the mean of its divisors is an integer number (98955338886).

Almost surely, 2^638421541150 is an apocalyptic number.

638421541150 is a deficient number, since it is larger than the sum of its proper divisors (549042525482).

638421541150 is a wasteful number, since it uses less digits than its factorization.

638421541150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12768430835 (or 12768430830 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

Adding to 638421541150 its reverse (51145124836), we get a palindrome (689566665986).

The spelling of 638421541150 in words is "six hundred thirty-eight billion, four hundred twenty-one million, five hundred forty-one thousand, one hundred fifty".