638201123060 has 24 divisors (see below), whose sum is σ = 1340495577960. Its totient is φ = 255228407424.

The previous prime is 638201123059. The next prime is 638201123071. The reversal of 638201123060 is 60321102836.

It can be written as a sum of positive squares in 4 ways, for example, as 476400887524 + 161800235536 = 690218^2 + 402244^2 .

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 7 ways as a sum of consecutive naturals, for example, 3151979 + ... + 3348338.

It is an arithmetic number, because the mean of its divisors is an integer number (55853982415).

Almost surely, 2^638201123060 is an apocalyptic number.

It is an amenable number.

638201123060 is an abundant number, since it is smaller than the sum of its proper divisors (702294454900).

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

638201123060 is a wasteful number, since it uses less digits than its factorization.

638201123060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6505235 (or 6505233 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

Adding to 638201123060 its reverse (60321102836), we get a palindrome (698522225896).

The spelling of 638201123060 in words is "six hundred thirty-eight billion, two hundred one million, one hundred twenty-three thousand, sixty".