68135751 has 12 divisors (see below), whose sum is σ = 98491120. Its totient is φ = 45390240.

The previous prime is 68135741. The next prime is 68135773. The reversal of 68135751 is 15753186.

68135751 is a `hidden beast` number, since 6 + 81 + 3 + 575 + 1 = 666.

It is not a de Polignac number, because 68135751 - 2⁷ = 68135623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68135701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18870 + ... + 22188.

Almost surely, 2^68135751 is an apocalyptic number.

68135751 is a deficient number, since it is larger than the sum of its proper divisors (30355369).

68135751 is a wasteful number, since it uses less digits than its factorization.

68135751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606 (or 5603 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 68135751 is about 8254.4382607177. The cubic root of 68135751 is about 408.4369417868.

It can be divided in two parts, 68135 and 751, that added together give a palindrome (68886).

The spelling of 68135751 in words is "sixty-eight million, one hundred thirty-five thousand, seven hundred fifty-one".