68557918 has 16 divisors (see below), whose sum is σ = 120815856. Its totient is φ = 28765440.

The previous prime is 68557901. The next prime is 68557919. The reversal of 68557918 is 81975586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68557919) 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, 119571 + ... + 120142.

It is an arithmetic number, because the mean of its divisors is an integer number (7550991).

Almost surely, 2^68557918 is an apocalyptic number.

68557918 is a deficient number, since it is larger than the sum of its proper divisors (52257938).

68557918 is a wasteful number, since it uses less digits than its factorization.

68557918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239739.

The product of its digits is 604800, while the sum is 49.

The square root of 68557918 is about 8279.9708936686. The cubic root of 68557918 is about 409.2787597552.

The spelling of 68557918 in words is "sixty-eight million, five hundred fifty-seven thousand, nine hundred eighteen".