68864550 has 96 divisors (see below), whose sum is σ = 182785920. Its totient is φ = 17107200.

The previous prime is 68864513. The next prime is 68864563. The reversal of 68864550 is 5546886.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent 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 47 ways as a sum of consecutive naturals, for example, 207885 + ... + 208215.

It is an arithmetic number, because the mean of its divisors is an integer number (1904020).

Almost surely, 2^68864550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68864550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91392960).

68864550 is an abundant number, since it is smaller than the sum of its proper divisors (113921370).

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

68864550 is a wasteful number, since it uses less digits than its factorization.

68864550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 42.

The square root of 68864550 is about 8298.4667258476. The cubic root of 68864550 is about 409.8880320863. Note that the first 3 decimals are identical.

The spelling of 68864550 in words is "sixty-eight million, eight hundred sixty-four thousand, five hundred fifty".