68635136 has 20 divisors (see below), whose sum is σ = 137137242. Its totient is φ = 34317312.

The previous prime is 68635129. The next prime is 68635153. The reversal of 68635136 is 63153686.

It can be written as a sum of positive squares in only one way, i.e., 66324736 + 2310400 = 8144^2 + 1520^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68635136.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66515 + ... + 67538.

Almost surely, 2^68635136 is an apocalyptic number.

It is an amenable number.

68635136 is a deficient number, since it is larger than the sum of its proper divisors (68502106).

68635136 is an equidigital number, since it uses as much as digits as its factorization.

68635136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134071 (or 134055 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 68635136 is about 8284.6325205165. The cubic root of 68635136 is about 409.4323614123.

The spelling of 68635136 in words is "sixty-eight million, six hundred thirty-five thousand, one hundred thirty-six".