68911864 has 32 divisors (see below), whose sum is σ = 154091520. Its totient is φ = 28249056.

The previous prime is 68911831. The next prime is 68911867. The reversal of 68911864 is 46811986.

It is a self number, because there is not a number n which added to its sum of digits gives 68911864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68911867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25464 + ... + 28039.

It is an arithmetic number, because the mean of its divisors is an integer number (4815360).

Almost surely, 2^68911864 is an apocalyptic number.

It is an amenable number.

68911864 is an abundant number, since it is smaller than the sum of its proper divisors (85179656).

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

68911864 is a wasteful number, since it uses less digits than its factorization.

68911864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53539 (or 53535 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 68911864 is about 8301.3170039458. The cubic root of 68911864 is about 409.9818829988.

The spelling of 68911864 in words is "sixty-eight million, nine hundred eleven thousand, eight hundred sixty-four".