68135836 has 12 divisors (see below), whose sum is σ = 120293712. Its totient is φ = 33766208.

The previous prime is 68135831. The next prime is 68135869. The reversal of 68135836 is 63853186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68135831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74920 + ... + 75823.

It is an arithmetic number, because the mean of its divisors is an integer number (10024476).

Almost surely, 2^68135836 is an apocalyptic number.

It is an amenable number.

68135836 is a deficient number, since it is larger than the sum of its proper divisors (52157876).

68135836 is a wasteful number, since it uses less digits than its factorization.

68135836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150860 (or 150858 counting only the distinct ones).

The product of its digits is 103680, while the sum is 40.

The square root of 68135836 is about 8254.4434094614. The cubic root of 68135836 is about 408.4371116297.

The spelling of 68135836 in words is "sixty-eight million, one hundred thirty-five thousand, eight hundred thirty-six".