68855144 has 8 divisors (see below), whose sum is σ = 129103410. Its totient is φ = 34427568.

The previous prime is 68855119. The next prime is 68855147. The reversal of 68855144 is 44155886.

It can be written as a sum of positive squares in only one way, i.e., 68724100 + 131044 = 8290^2 + 362^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×68855144³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (68855147) by changing a digit.

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 as a sum of consecutive naturals, namely, 4303439 + ... + 4303454.

Almost surely, 2^68855144 is an apocalyptic number.

It is an amenable number.

68855144 is a deficient number, since it is larger than the sum of its proper divisors (60248266).

68855144 is a wasteful number, since it uses less digits than its factorization.

68855144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8606899 (or 8606895 counting only the distinct ones).

The product of its digits is 153600, while the sum is 41.

The square root of 68855144 is about 8297.8999752950. The cubic root of 68855144 is about 409.8693694489.

The spelling of 68855144 in words is "sixty-eight million, eight hundred fifty-five thousand, one hundred forty-four".