68136568 has 8 divisors (see below), whose sum is σ = 127756080. Its totient is φ = 34068280.

The previous prime is 68136559. The next prime is 68136577. The reversal of 68136568 is 86563186.

It is an interprime number because it is at equal distance from previous prime (68136559) and next prime (68136577).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4258528 + ... + 4258543.

It is an arithmetic number, because the mean of its divisors is an integer number (15969510).

Almost surely, 2^68136568 is an apocalyptic number.

It is an amenable number.

68136568 is a deficient number, since it is larger than the sum of its proper divisors (59619512).

68136568 is a wasteful number, since it uses less digits than its factorization.

68136568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8517077 (or 8517073 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 68136568 is about 8254.4877490975. The cubic root of 68136568 is about 408.4385742712.

It can be divided in two parts, 681 and 36568, that added together give a square (37249 = 193²).

The spelling of 68136568 in words is "sixty-eight million, one hundred thirty-six thousand, five hundred sixty-eight".