67708423538 has 12 divisors (see below), whose sum is σ = 118144290222. Its totient is φ = 29017895760.

The previous prime is 67708423513. The next prime is 67708423571. The reversal of 67708423538 is 83532480776.

It can be written as a sum of positive squares in only one way, i.e., 59133107929 + 8575315609 = 243173^2 + 92603^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 67708423538.

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, 345451043 + ... + 345451238.

Almost surely, 2^67708423538 is an apocalyptic number.

67708423538 is a deficient number, since it is larger than the sum of its proper divisors (50435866684).

67708423538 is a wasteful number, since it uses less digits than its factorization.

67708423538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690902297 (or 690902290 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 67708423538 in words is "sixty-seven billion, seven hundred eight million, four hundred twenty-three thousand, five hundred thirty-eight".