67138120850 has 12 divisors (see below), whose sum is σ = 124876904874. Its totient is φ = 26855248320.

The previous prime is 67138120817. The next prime is 67138120873. The reversal of 67138120850 is 5802183176.

It can be written as a sum of positive squares in 3 ways, for example, as 25930338841 + 41207782009 = 161029^2 + 202997^2 .

It is a junction number, because it is equal to n+sod(n) for n = 67138120798 and 67138120807.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 671381159 + ... + 671381258.

Almost surely, 2^67138120850 is an apocalyptic number.

67138120850 is a deficient number, since it is larger than the sum of its proper divisors (57738784024).

67138120850 is a wasteful number, since it uses less digits than its factorization.

67138120850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342762429 (or 1342762424 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 67138120850 in words is "sixty-seven billion, one hundred thirty-eight million, one hundred twenty thousand, eight hundred fifty".