68135613250 has 32 divisors (see below), whose sum is σ = 135052809840. Its totient is φ = 25651052800.

The previous prime is 68135613223. The next prime is 68135613289. The reversal of 68135613250 is 5231653186.

It can be written as a sum of positive squares in 8 ways, for example, as 149744169 + 67985869081 = 12237^2 + 260741^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8011705 + ... + 8020204.

Almost surely, 2^68135613250 is an apocalyptic number.

68135613250 is a deficient number, since it is larger than the sum of its proper divisors (66917196590).

68135613250 is a wasteful number, since it uses less digits than its factorization.

68135613250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16031943 (or 16031933 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 68135613250 in words is "sixty-eight billion, one hundred thirty-five million, six hundred thirteen thousand, two hundred fifty".