68817530 has 32 divisors (see below), whose sum is σ = 131674896. Its totient is φ = 25805824.

The previous prime is 68817503. The next prime is 68817569. The reversal of 68817530 is 3571886.

It can be written as a sum of positive squares in 8 ways, for example, as 26450449 + 42367081 = 5143^2 + 6509^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53252 + ... + 54528.

Almost surely, 2^68817530 is an apocalyptic number.

68817530 is a deficient number, since it is larger than the sum of its proper divisors (62857366).

68817530 is a wasteful number, since it uses less digits than its factorization.

68817530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 68817530 is about 8295.6331886119. The cubic root of 68817530 is about 409.7947217479.

The spelling of 68817530 in words is "sixty-eight million, eight hundred seventeen thousand, five hundred thirty".