638927100060 has 48 divisors (see below), whose sum is σ = 1798990300800. Its totient is φ = 169428710464.

The previous prime is 638927100041. The next prime is 638927100079. The reversal of 638927100060 is 60001729836.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (638927100041) and next prime (638927100079).

It is a junction number, because it is equal to n+sod(n) for n = 638927099985 and 638927100021.

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 15 ways as a sum of consecutive naturals, for example, 29734470 + ... + 29755949.

It is an arithmetic number, because the mean of its divisors is an integer number (37478964600).

Almost surely, 2^638927100060 is an apocalyptic number.

638927100060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

638927100060 is an abundant number, since it is smaller than the sum of its proper divisors (1160063200740).

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

638927100060 is a wasteful number, since it uses less digits than its factorization.

638927100060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59490610 (or 59490608 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

Adding to 638927100060 its reverse (60001729836), we get a palindrome (698928829896).

The spelling of 638927100060 in words is "six hundred thirty-eight billion, nine hundred twenty-seven million, one hundred thousand, sixty".