68518738 has 16 divisors (see below), whose sum is σ = 110611224. Its totient is φ = 31714560.

The previous prime is 68518727. The next prime is 68518739. The reversal of 68518738 is 83781586.

It can be written as a sum of positive squares in 4 ways, for example, as 25130169 + 43388569 = 5013^2 + 6587^2 .

It is a super-2 number, since 2×68518738² = 9389634914225288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68518739) 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, 14445 + ... + 18592.

Almost surely, 2^68518738 is an apocalyptic number.

68518738 is a deficient number, since it is larger than the sum of its proper divisors (42092486).

68518738 is a wasteful number, since it uses less digits than its factorization.

68518738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33117.

The product of its digits is 322560, while the sum is 46.

The square root of 68518738 is about 8277.6046051983. The cubic root of 68518738 is about 409.2007789863.

The spelling of 68518738 in words is "sixty-eight million, five hundred eighteen thousand, seven hundred thirty-eight".