638101804890050 has 192 divisors, whose sum is σ = 1357166926828800. Its totient is φ = 221756167987200.

The previous prime is 638101804890047. The next prime is 638101804890103. The reversal of 638101804890050 is 50098408101836.

It is a super-3 number, since 3×638101804890050³ (a number of 45 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 638101804889974 and 638101804890001.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1235125790 + ... + 1235642310.

It is an arithmetic number, because the mean of its divisors is an integer number (7068577743900).

Almost surely, 2^{638101804890050} is an apocalyptic number.

638101804890050 is an abundant number, since it is smaller than the sum of its proper divisors (719065121938750).

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

638101804890050 is a wasteful number, since it uses less digits than its factorization.

638101804890050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518781 (or 518776 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 53.

The spelling of 638101804890050 in words is "six hundred thirty-eight trillion, one hundred one billion, eight hundred four million, eight hundred ninety thousand, fifty".