638377119861 has 8 divisors (see below), whose sum is σ = 916644069600. Its totient is φ = 392847458352.

The previous prime is 638377119851. The next prime is 638377119917. The reversal of 638377119861 is 168911773836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 638377119861 - 2²⁵ = 638343565429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 638377119795 and 638377119804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638377119851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8184322011 + ... + 8184322088.

It is an arithmetic number, because the mean of its divisors is an integer number (114580508700).

Almost surely, 2^638377119861 is an apocalyptic number.

It is an amenable number.

638377119861 is a deficient number, since it is larger than the sum of its proper divisors (278266949739).

638377119861 is a wasteful number, since it uses less digits than its factorization.

638377119861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16368644115.

The product of its digits is 9144576, while the sum is 60.

The spelling of 638377119861 in words is "six hundred thirty-eight billion, three hundred seventy-seven million, one hundred nineteen thousand, eight hundred sixty-one".