68355136 has 28 divisors (see below), whose sum is σ = 137873740. Its totient is φ = 33615360.

The previous prime is 68355109. The next prime is 68355139. The reversal of 68355136 is 63155386.

It can be written as a sum of positive squares in 2 ways, for example, as 1115136 + 67240000 = 1056^2 + 8200^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68355095 and 68355104.

It is not an unprimeable number, because it can be changed into a prime (68355139) 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, 4851 + ... + 12658.

Almost surely, 2^68355136 is an apocalyptic number.

It is an amenable number.

68355136 is an abundant number, since it is smaller than the sum of its proper divisors (69518604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68355136 is a wasteful number, since it uses less digits than its factorization.

68355136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17582 (or 17572 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 68355136 is about 8267.7164924784. The cubic root of 68355136 is about 408.8748369112.

The spelling of 68355136 in words is "sixty-eight million, three hundred fifty-five thousand, one hundred thirty-six".