68196638 has 4 divisors (see below), whose sum is σ = 102294960. Its totient is φ = 34098318.

The previous prime is 68196619. The next prime is 68196641. The reversal of 68196638 is 83669186.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68196592 and 68196601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17049158 + ... + 17049161.

It is an arithmetic number, because the mean of its divisors is an integer number (25573740).

Almost surely, 2^68196638 is an apocalyptic number.

68196638 is a deficient number, since it is larger than the sum of its proper divisors (34098322).

68196638 is a wasteful number, since it uses less digits than its factorization.

68196638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34098321.

The product of its digits is 373248, while the sum is 47.

The square root of 68196638 is about 8258.1255742450. The cubic root of 68196638 is about 408.5585670999.

The spelling of 68196638 in words is "sixty-eight million, one hundred ninety-six thousand, six hundred thirty-eight".